Writing Equations to Represent Independent and Dependent Quantities(TEKS.Math.6.6.B)

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Texas 6th Grade Math › Writing Equations to Represent Independent and Dependent Quantities(TEKS.Math.6.6.B)

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Notebooks $n$: 0, 2, 4, 6 Cost (dollars) $c$: 0, 3, 6, 9

What equation shows how $c$ depends on $n$?

$n=1.5c$

$c=1.5n$

CORRECT

$c=n+1.5$

$c=2n$

Cost increases by 3 dollars every 2 notebooks, which is \$1.5$ per notebook, and $c=0$ when $n=0$. So $c=1.5n$.