Interpret Inequalities on Number Lines

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6th Grade Math › Interpret Inequalities on Number Lines

Questions 1 - 10
1

On a number line, point $a$ is at $-7$ and point $b$ is at $-3$. Which inequality correctly describes their positions?

$-3<-7$ because numbers increase as you move left.

$-7=-3$ because both numbers are negative.

$-7>-3$ because 7 is greater than 3.

$-7<-3$ because $-7$ is to the left of $-3$ on the number line.

Explanation

This question tests interpreting inequalities as position statements on a number line: a < b means a is to the left of b (a is smaller, b is larger), understanding that values increase from left to right, including comparing signed numbers. On a number line, a < b means a is positioned to the left of b (a has a smaller value, b is larger, with left < right); for example, 5 > 3 because 5 is to the right of 3 (farther from zero for positives means greater), -2 > -5 because -2 is to the right of -5 (closer to zero for negatives means less negative and thus greater, like -2°C is warmer than -5°C), and 2 > -3 because positive 2 is to the right of negative -3 (any positive is greater than any negative), with order increasing from left to right such as -7 < -3 < 0 < 2 < 5 arranged left to right showing least to greatest. For points at -7 and -3 on the number line, -7 is farther left (more negative, smaller), -3 is closer to zero (less negative, greater), so -3 is positioned to the right of -7, meaning -7 < -3 or equivalently -3 > -7. The correct inequality is -7 < -3 because -7 is to the left of -3 on the number line, which is choice B. A common error is magnitude comparison for negatives, like -7 > -3 because 7 > 3 (but actually -7 < -3), or claiming numbers increase leftward (reversing direction), or equality because both negative. When interpreting, the inequality symbol shows position (< means left of, > means right of), and for negatives, the less negative is greater and farther right, like |-7| > |-3| but -7 < -3 since -7 is left; comparing same-sign, magnitudes reverse for negatives. The number line helps visualize (left < right), aiding in plotting and seeing the right one is greater, avoiding mistakes like reversing position or magnitude errors.

2

A number line is shown from $-10$ to $10$ with two points marked: $P$ at $-1$ and $Q$ at $4$. Which inequality matches the positions of $P$ and $Q$?

$4<-1$ because 4 is farther from 0 than $-1$.

$-1>4$ because $-1$ is to the left of 4.

$-1<4$ because $-1$ is to the left of 4 on the number line.

$-1=4$ because they are on different sides of 0.

Explanation

This question tests interpreting inequalities as position statements on a number line: a < b means a is to the left of b (a is smaller, b is larger), understanding that values increase from left to right, including comparing signed numbers. On a number line, a < b means a is positioned to the left of b (a has a smaller value, b is larger, with left < right); for example, 5 > 3 because 5 is to the right of 3 (farther from zero for positives means greater), -2 > -5 because -2 is to the right of -5 (closer to zero for negatives means less negative and thus greater, like -2 is higher than -5 m below sea level), and 2 > -3 because positive 2 is to the right of negative -3 (any positive is greater than any negative), with order increasing from left to right such as -7 < -3 < 0 < 2 < 5 arranged left to right showing least to greatest. For points P at -1 and Q at 4 on the number line, -1 is to the left (negative, smaller), 4 is to the right (positive, larger), so -1 is left of 4, meaning -1 < 4. The correct inequality is -1 < 4 because -1 is to the left of 4 on the number line, which is choice C. A common error is thinking farther from zero means less (but for different signs, positive is greater), or claiming -1 > 4 because left (reversing meaning), or equality due to different sides. When interpreting, the inequality symbol shows position (< means left of, > means right of), and for different signs, positive always > negative like 4 > -1 since right; comparing signed, plot to see right is greater. The number line visualizes order (left < right), helping avoid mistakes like position reversal or zero confusion.

3

A number line is drawn. Point $x$ is at $-8$ and point $y$ is at $-8$. Which statement is true?

$x<y$ because the left side of the number line is greater.

$x>y$ because $-8$ is to the right of $-8$.

$x\le y$ because both points are at the same position on the number line.

$x\ge y$ is false because negative numbers cannot be equal.

Explanation

This question tests interpreting inequalities as position statements on a number line: a < b means a is to the left of b (a is smaller, b is larger), understanding that values increase from left to right, including comparing signed numbers. In number line interpretation, a < b means a is positioned to the left of b (a has a smaller value, b is larger, with left being less than right); for example, 5 > 3 because 5 is to the right of 3 (farther from zero for positives means greater), -2 > -5 because -2 is to the right of -5 (closer to zero for negatives means less negative and thus greater), and 2 > -3 because positive 2 is to the right of negative -3 (any positive is greater than any negative), with order increasing from left to right such as -7 < -3 < 0 < 2 < 5 arranged left to right showing least to greatest. For points x and y both at -8 on a number line, they are at the same position, so x = y, meaning inequalities like x <= y or x >= y are true since they include equality. The correct statement is x <= y because both points are at the same position on the number line, which matches choice B. A common error is claiming x > y despite same (choice A), or x < y with left greater (choice C), or x >= y false because negative (choice D), ignoring equality for negatives. When interpreting equals, <= or >= apply; comparing same negatives shows equality like positives. The number line helps by showing identical spots, with mistakes like assuming negatives can't equal or direction issues.

4

A submarine is at an elevation of $-2$ meters (below sea level) and another is at $-5$ meters. Which interpretation of the inequality $-2>-5$ is correct on a number line?

On a number line, $-2$ is to the left of $-5$, so $-2$ is greater.

Negative numbers cannot be compared on a number line.

Because $5$ is bigger than $2$, $-5$ must be greater than $-2$.

On a number line, $-2$ is to the right of $-5$, so $-2$ is greater.

Explanation

This question tests interpreting inequalities as position statements on a number line: a < b means a is left of b (a smaller, b larger), understanding left-to-right increases, comparing signed numbers. Number line interpretation: a < b means a positioned left of b on number line (a is smaller value, b is larger, left < right); examples: 5 > 3 (5 right of 3, farther from zero for positives means greater), -2 > -5 (−2 right of -5, closer to zero for negatives means less negative thus greater: -2 is warmer than -5°C, higher than -5 m below sea level), 2 > -3 (positive 2 right of negative -3, any positive > any negative); order: increasing from left to right (-7 < -3 < 0 < 2 < 5 arranged left to right on line shows least to greatest). For example, inequality -3 > -7 on number line: -7 is farther left (more negative, smaller), -3 is closer to zero (less negative, greater), so -3 positioned right of -7, inequality -3 > -7 means -3 is right of -7; or 5 > 3 shows 5 right of 3 (both positive, 5 farther from zero is larger); or order -5, -2, 0, 3 from least to greatest: positions left-to-right: -5 leftmost (smallest), then -2, then 0, then 3 rightmost (largest). The correct interpretation is that on a number line, -2 is to the right of -5, so -2 is greater, matching choice A. A common error is reversing positions, like claiming -2 is left of -5 so greater (choice B), or using magnitude comparison for negatives like 5 > 2 so -5 > -2 (choice C), or thinking negatives cannot be compared (choice D). Interpreting: inequality symbol shows position (< means left of, > means right of), greater value is farther right (for positives: larger number farther from zero; for negatives: less negative is greater, closer to zero is right). Comparing signed: same sign (magnitudes for positives: 5 > 3, |-7| > |-3| but -7 < -3 because farther left), different signs (positive always > negative: 1 > -100); ordering: arrange left-to-right for least-to-greatest (start with most negative, end with most positive); number line as tool: visual shows order (left < right), helps compare signed numbers (plot both, see which is right); mistakes: reversing greater/less with position, magnitude error for negatives, zero position wrong, direction confused.

5

On a number line, point $a$ is at $-1$ and point $b$ is at $4$. Which inequality correctly describes their positions?

$a>b$ because negative numbers are always greater than positive numbers.

$a>b$ because $-1$ is to the left of $4$.

$a=b$ because they are on opposite sides of $0$.

$a<b$ because $-1$ is to the left of $4$.

Explanation

This question tests interpreting inequalities as position statements on a number line: a < b means a is left of b (a smaller, b larger), understanding left-to-right increases, comparing signed numbers. Number line interpretation: a < b means a positioned left of b on number line (a is smaller value, b is larger, left < right); examples: 5 > 3 (5 right of 3, farther from zero for positives means greater), -2 > -5 (−2 right of -5, closer to zero for negatives means less negative thus greater: -2 is warmer than -5°C, higher than -5 m below sea level), 2 > -3 (positive 2 right of negative -3, any positive > any negative); order: increasing from left to right (-7 < -3 < 0 < 2 < 5 arranged left to right on line shows least to greatest). For example, inequality -3 > -7 on number line: -7 is farther left (more negative, smaller), -3 is closer to zero (less negative, greater), so -3 positioned right of -7, inequality -3 > -7 means -3 is right of -7; or 5 > 3 shows 5 right of 3 (both positive, 5 farther from zero is larger); or order -5, -2, 0, 3 from least to greatest: positions left-to-right: -5 leftmost (smallest), then -2, then 0, then 3 rightmost (largest). The correct inequality is a < b because -1 is to the left of 4, matching choice B. A common error is reversing the inequality like a > b because left or negatives greater (choices A and D), or thinking opposite sides mean equal (choice C). Interpreting: inequality symbol shows position (< means left of, > means right of), greater value is farther right (for positives: larger number farther from zero; for negatives: less negative is greater, closer to zero is right). Comparing signed: same sign (magnitudes for positives: 5 > 3, |-7| > |-3| but -7 < -3 because farther left), different signs (positive always > negative: 1 > -100); ordering: arrange left-to-right for least-to-greatest (start with most negative, end with most positive); number line as tool: visual shows order (left < right), helps compare signed numbers (plot both, see which is right); mistakes: reversing greater/less with position, magnitude error for negatives, zero position wrong, direction confused.

6

In a science lab, one thermometer reads $2^\circ\text{C}$ and another reads $-3^\circ\text{C}$. Which inequality correctly compares the temperatures, and what does it mean on a number line?

$2>-3$ because $2$ is to the right of $-3$ on the number line.

$2<-3$ because $-3$ is farther from $0$.

$-3>2$ because negative numbers are always greater than positive numbers.

$2=-3$ because they are on opposite sides of $0$.

Explanation

This question tests interpreting inequalities as position statements on a number line: a < b means a is left of b (a smaller, b larger), understanding left-to-right increases, comparing signed numbers. Number line interpretation: a < b means a positioned left of b on number line (a is smaller value, b is larger, left < right); examples: 5 > 3 (5 right of 3, farther from zero for positives means greater), -2 > -5 (−2 right of -5, closer to zero for negatives means less negative thus greater: -2 is warmer than -5°C, higher than -5 m below sea level), 2 > -3 (positive 2 right of negative -3, any positive > any negative); order: increasing from left to right (-7 < -3 < 0 < 2 < 5 arranged left to right on line shows least to greatest). For example, inequality -3 > -7 on number line: -7 is farther left (more negative, smaller), -3 is closer to zero (less negative, greater), so -3 positioned right of -7, inequality -3 > -7 means -3 is right of -7; or 5 > 3 shows 5 right of 3 (both positive, 5 farther from zero is larger); or order -5, -2, 0, 3 from least to greatest: positions left-to-right: -5 leftmost (smallest), then -2, then 0, then 3 rightmost (largest). The correct interpretation is 2 > -3 because 2 is to the right of -3 on the number line, matching choice B. A common error is claiming negatives are always greater than positives (choice A or D), or that being farther from 0 makes -3 greater (choice C), or they are equal due to opposite sides (choice D). Interpreting: inequality symbol shows position (< means left of, > means right of), greater value is farther right (for positives: larger number farther from zero; for negatives: less negative is greater, closer to zero is right). Comparing signed: same sign (magnitudes for positives: 5 > 3, |-7| > |-3| but -7 < -3 because farther left), different signs (positive always > negative: 1 > -100); ordering: arrange left-to-right for least-to-greatest (start with most negative, end with most positive); number line as tool: visual shows order (left < right), helps compare signed numbers (plot both, see which is right); mistakes: reversing greater/less with position, magnitude error for negatives, zero position wrong, direction confused.

7

A science class records these temperatures (in °C): $-7, -3, 0, 2, 5$. Which list shows the numbers ordered from least to greatest (left to right on a number line)?

$-7, 0, -3, 2, 5$

$5, 2, 0, -3, -7$

$-3, -7, 0, 2, 5$

$-7, -3, 0, 2, 5$

Explanation

This question tests interpreting inequalities as position statements on a number line: a < b means a is to the left of b (a is smaller, b is larger), understanding that values increase from left to right, including comparing signed numbers. On a number line, a < b means a is positioned to the left of b (a has a smaller value, b is larger, with left < right); for example, 5 > 3 because 5 is to the right of 3 (farther from zero for positives means greater), -2 > -5 because -2 is to the right of -5 (closer to zero for negatives means less negative and thus greater, like -2°C is warmer than -5°C), and 2 > -3 because positive 2 is to the right of negative -3 (any positive is greater than any negative), with order increasing from left to right such as -7 < -3 < 0 < 2 < 5 arranged left to right showing least to greatest. For ordering -7, -3, 0, 2, 5 from least to greatest, positions are -7 leftmost (smallest), then -3, then 0, then 2, then 5 rightmost (largest), reflecting increasing order left to right on the number line for temperatures. The correct list is -7, -3, 0, 2, 5, which matches choice C. A common error is wrong order, like starting with -3 before -7 (not arranging most negative first), or reversing to greatest to least, or misplacing zero (like between -3 and 2 incorrectly). Ordering arranges left-to-right for least-to-greatest (most negative to most positive); the number line shows this visually (left < right), helping compare signed numbers by plotting and reading left to right. Mistakes include direction confusion or ignoring negatives are left of zero.

8

A number line shows points labeled $-7$, $-3$, $0$, $2$, and $5$. Which list shows these numbers in order from least to greatest (left to right on the number line)?

$-3,,-7,,0,,2,,5$

$5,,2,,0,,-3,,-7$

$-7,,0,,-3,,2,,5$

$-7,,-3,,0,,2,,5$

Explanation

This question tests interpreting inequalities as position statements on a number line: a < b means a is left of b (a smaller, b larger), understanding left-to-right increases, comparing signed numbers. Number line interpretation: a < b means a positioned left of b on number line (a is smaller value, b is larger, left < right); examples: 5 > 3 (5 right of 3, farther from zero for positives means greater), -2 > -5 (−2 right of -5, closer to zero for negatives means less negative thus greater: -2 is warmer than -5°C, higher than -5 m below sea level), 2 > -3 (positive 2 right of negative -3, any positive > any negative); order: increasing from left to right (-7 < -3 < 0 < 2 < 5 arranged left to right on line shows least to greatest). For example, inequality -3 > -7 on number line: -7 is farther left (more negative, smaller), -3 is closer to zero (less negative, greater), so -3 positioned right of -7, inequality -3 > -7 means -3 is right of -7; or 5 > 3 shows 5 right of 3 (both positive, 5 farther from zero is larger); or order -5, -2, 0, 3 from least to greatest: positions left-to-right: -5 leftmost (smallest), then -2, then 0, then 3 rightmost (largest). The correct order from least to greatest is -7, -3, 0, 2, 5, matching choice C. A common error is wrong ordering like starting with -3 before -7 (choice A), descending order (choice B), or misplaced zero and -3 (choice D), not arranging left-to-right properly. Interpreting: inequality symbol shows position (< means left of, > means right of), greater value is farther right (for positives: larger number farther from zero; for negatives: less negative is greater, closer to zero is right). Comparing signed: same sign (magnitudes for positives: 5 > 3, |-7| > |-3| but -7 < -3 because farther left), different signs (positive always > negative: 1 > -100); ordering: arrange left-to-right for least-to-greatest (start with most negative, end with most positive); number line as tool: visual shows order (left < right), helps compare signed numbers (plot both, see which is right); mistakes: reversing greater/less with position, magnitude error for negatives, zero position wrong, direction confused.

9

A student’s account balance is $\$0$ and another student’s balance is $$-4$ (they owe $\$4$). Which statement is true on a number line?

$0<-4$ because 0 is the smallest number.

$0=-4$ because both are not positive.

$-4>0$ because 4 is greater than 0.

$0>-4$ because 0 is to the right of $-4$ on the number line.

Explanation

This question tests interpreting inequalities as position statements on a number line: a < b means a is to the left of b (a is smaller, b is larger), understanding that values increase from left to right, including comparing signed numbers. On a number line, a < b means a is positioned to the left of b (a has a smaller value, b is larger, with left < right); for example, 5 > 3 because 5 is to the right of 3 (farther from zero for positives means greater), -2 > -5 because -2 is to the right of -5 (closer to zero for negatives means less negative and thus greater, like -2 is higher than -5 m below sea level), and 2 > -3 because positive 2 is to the right of negative -3 (any positive is greater than any negative), with order increasing from left to right such as -7 < -3 < 0 < 2 < 5 arranged left to right showing least to greatest. For comparing 0 and -4 on the number line, -4 is to the left (negative, smaller), 0 is to the right (greater), so 0 is positioned to the right of -4, meaning 0 > -4; this matches account balances where $0 is better than owing $4. The correct statement is 0 > -4 because 0 is to the right of -4 on the number line, which is choice B. A common error is thinking zero is the smallest (ignoring negatives are smaller), or magnitude like -4 > 0 because 4 > 0 (ignoring sign), or claiming equality because both not positive. When interpreting, the inequality symbol shows position (< means left of, > means right of), and zero is greater than negatives since it's to their right; for different signs, positive (including zero) > negative. The number line visualizes order (left < right), helping compare by plotting points and seeing which is right, avoiding mistakes like zero as smallest or direction confused.

10

A student writes the inequality $5>3$ to compare two scores. What does $5>3$ mean on a number line?

5 is to the left of 3 on the number line, so 5 is less than 3.

3 is to the right of 5 on the number line, so 5 is less than 3.

5 is to the right of 3 on the number line, so 5 is greater than 3.

5 and 3 are the same point on the number line because they are both positive.

Explanation

This question tests interpreting inequalities as position statements on a number line: a < b means a is to the left of b (a is smaller, b is larger), understanding that values increase from left to right, including comparing signed numbers. In number line interpretation, a < b means a is positioned to the left of b (a has a smaller value, b is larger, with left being less than right); for example, 5 > 3 because 5 is to the right of 3 (farther from zero for positives means greater), -2 > -5 because -2 is to the right of -5 (closer to zero for negatives means less negative and thus greater, like -2°C being warmer than -5°C), and 2 > -3 because positive 2 is to the right of negative -3 (any positive is greater than any negative), with order increasing from left to right such as -7 < -3 < 0 < 2 < 5 arranged left to right showing least to greatest. For the inequality 5 > 3 on a number line, 3 is farther left (smaller positive, closer to zero), 5 is to the right (larger positive, farther from zero), so 5 is positioned to the right of 3, meaning 5 > 3 indicates 5 is greater than 3. The correct interpretation is that 5 is to the right of 3 on the number line, so 5 is greater than 3, which matches choice B. A common error is reversing positions, like claiming 5 is to the left of 3 so 5 is less (as in choice A or D), or thinking they are the same because both positive (choice C), ignoring that left-to-right order properly shows increasing values. When interpreting, the inequality symbol shows position (> means right of, < means left of), with greater values farther right (for positives, larger numbers are farther from zero); comparing signed numbers involves magnitudes for positives like 5 > 3, but for negatives, being closer to zero means greater, and positives are always greater than negatives. Ordering uses left-to-right for least-to-greatest, starting with smaller numbers; the number line visually shows this order (left < right), helping compare values by seeing which is to the right, with mistakes like confusing direction or zero's position.

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