#### Answer

$y=\frac{k}{x^3}$

#### Work Step by Step

Because $y$ varies inversely as $x^3$, $y$ is inversely proportional to $x^3$. So we have
$y=\frac{k}{x^3}$.

Published by
Pearson

ISBN 10:
0321726391

ISBN 13:
978-0-32172-639-1

$y=\frac{k}{x^3}$

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