Answer
$f(x)=3$ is not one to one.
Work Step by Step
The function $f(x)=3$ is not one-to-one because it is a horizontal line. The function will fail the horizontal line test because a line drawn at $y=3$ will hit all the points of $f(x)=3$.
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 4 - Section 4.1 - Inverse Functions - 4.1 Exercises - Page 394: 21
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