Answer
$y$ is a function of $x$
Work Step by Step
Solve the equation for $y$:
$x^2-y=9$
$-y=-x^2+9$
$y=x^2-9$
So, for each value of $x$ in the domain we will find one and only one value of $y$. For example, if $x=5$
$y=5^2-9=25-9=16$
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 2 - 2.2 - Functions - 2.2 Exercises - Page 182: 12
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