Answer
$y$ is a function of $x$
Work Step by Step
Solve for $y$ in terms of $x$ to obtain:
$y=-x^2+5$
Note that each value of $x$ will give only one value of $y$.
Thus, the given equation represents $y$ as a function of $x$.
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13446-914-3
ISBN 13:
978-0-13446-914-0
Chapter 1 - Mid-Chapter Check Point - Page 228: 7
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