High School Math : How to find x or y intercept

Study concepts, example questions & explanations for High School Math

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Example Questions

Example Question #71 : Algebra I

What is the x-intercept of ?

Possible Answers:

Correct answer:

Explanation:

To find the x-intercept, we set and solve.

Subtract from both sides.

Divide both sides by .

Simplify.

Example Question #72 : Coordinate Geometry

What is the x-intercept of the following equation? 

Possible Answers:

5

-5

0

2

10

Correct answer:

5

Explanation:

We want to find the x-intercept, which is the point at which the graph crosses the x-axis. Every point on the x-axis has a y-value of 0. Thus, to find the x-intercept we just need to plug 0 in for y. 

Thus, .

Dividing both sides by , we get

Example Question #71 : Coordinate Geometry

What is the y-intercept of the following curve? 

 

 

Possible Answers:

Correct answer:

Explanation:

The y-intercept of a curve is the value of that curve when the x-coordinate is . Thus, we plug in  to our equation, yielding

Example Question #81 : Coordinate Geometry

Find the x and y-intercepts of the following equation: 

Possible Answers:

y-intercept: 

x-intercept: 

y-intercept: 

x-intercept: 

y-intercept: 

x-intercept: 

y-intercept: 

x-intercept: 

y-intercept: 

x-intercept: 

Correct answer:

y-intercept: 

x-intercept: 

Explanation:

To find the y-intercept, substitute zero for x and solve for y:

The y-intercept is at point .

To find the x-intercept, substitute zero for y and solve for x:

The x-intercept is at point .

Example Question #11 : Intercepts And Curves

What is the x-intercept of ?

Possible Answers:

Correct answer:

Explanation:

To find the x-intercept, we set and solve.

Add to both sides.

Divide both sides by .

Simplify.
 

Example Question #81 : Algebra I

What is the x-intercept of ?

Possible Answers:

Correct answer:

Explanation:

To find the x-intercept, set and solve.

Multiply both sides by .

Example Question #13 : Intercepts And Curves

What is the x-intercept of ?

Possible Answers:

Correct answer:

Explanation:

To find the x-intercept, set and solve.

Example Question #82 : Algebra I

What is the y-intercept of ?

Possible Answers:

Correct answer:

Explanation:

To find the y-intercept, set and solve.

Example Question #11 : How To Find X Or Y Intercept

Find the -intercept.

Possible Answers:

Correct answer:

Explanation:

To find the -intercept, we set the -value equal to zero.

Example Question #82 : Coordinate Geometry

What is the -intercept of ?

Possible Answers:

Correct answer:

Explanation:

To find the -intercept, set the  value equal to zero:

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