Answer
$2$
Work Step by Step
The graph shows that if you draw the line $y=2$, the line will intersect the graph (curve) at two points.
This means that there are $2$ solutions to the equation $f(x)=4$.
College Algebra (11th Edition)
by Lial, Margaret L.; Hornsby John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
0321671791
ISBN 13:
978-0-32167-179-0
Chapter 3 - Section 3.1 - Quadratic Functions and Models - 3.1 Exercises - Page 294: 30
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