Answer
$y=\frac{56}{x^3}$
Work Step by Step
$y=\frac{k}{x^3}$
$y=7$ when $x=2$:
$7=\frac{k}{2^3}=\frac{k}{8}$
$k=7(8)=56$
Then:
$y=\frac{56}{x^3}$
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 296: 56
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