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.)
College Algebra 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305115546
ISBN 13:
978-1-30511-554-5
Chapter 1, Equations and Graphs - Section 1.10 - Modeling Variation - 1.10 Exercises - Page 164: 13
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