Answer
$y=-14$
Work Step by Step
The function form of a direct variation is $y=kx$.
$8=k(-4)$ - Substitute $x=-4$ and $y=8$-
$8=-4k$
$-2=k$
The direct variation equation would be $y=-2x$
$y=(-2)(7)$ when $x=7$ so therefore $y=-14$
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: 12
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