Expressions, Equations, and Relationships>Writing Equations to Represent Independent and Dependent Quantities(TEKS.Math.6.6.B)
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Texas 6th Grade Math › Expressions, Equations, and Relationships>Writing Equations to Represent Independent and Dependent Quantities(TEKS.Math.6.6.B)
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1
Notebooks $n$: 0, 2, 4, 6 Cost (dollars) $c$: 0, 3, 6, 9
What equation shows how $c$ depends on $n$?
$n=1.5c$
$c=1.5n$
$c=n+1.5$
$c=2n$
Explanation
Cost increases by 3 dollars every 2 notebooks, which is $1.5$ per notebook, and $c=0$ when $n=0$. So $c=1.5n$.