Answer
$x=-2$
Work Step by Step
Note that the only point on the graph where the value of the function is $4$ is $(-2, 4)$.
This means that $f(x) = 4$ only when $x=-2$.
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 2 - Mid-Chapter Check Point - Page 135: 9
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