Answer
$y=17.5$
Work Step by Step
The function form of a direct variation is $y=kx$.
$15=k(6)$ - Substitute $x=6$ and $y=15$-
$15=6k$
$2.5=k$
The direct variation equation would be $y=2.5x$
$y=(2.5)(7)$ when $x=7$ so therefore $y=17.5$
Algebra 1: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281140
ISBN 13:
978-0-13328-114-9
Chapter 5 - Linear Functions - Chapter Review - Page 354: 13
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