Answer
jointly proportional
Work Step by Step
It means that as $x$ increases and $y$ increases, $z$ increases jointly.
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 3 - 3.5 - Mathematical Modeling and Variation - 3.5 Exercises - Page 294: 8
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