#### Answer

$z=k\sqrt{y}$

#### Work Step by Step

Since $z$ is directly proportional to the square root of $y$, we have:
$z=k\sqrt{y}$
(and $k$ is a constant.)

Published by
Brooks Cole

ISBN 10:
1305115546

ISBN 13:
978-1-30511-554-5

$z=k\sqrt{y}$

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