Answer
A
Work Step by Step
$z=axy$, where a is the constant of variation.
We rearrange to get $a=z/(xy)$
Plugging in our variables $ y=-4, x=-3, z=-36$
$a=-36/[(-4)*(-3)]$ or $a=-3$
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 8 Rational Functions - 8.1 Model Inverse and Joint Variation - 8.1 Exercises - Skill Practice - Page 555: 30
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