Answer
H
Work Step by Step
A vertical line means that the y does not change.
The only function where y is not included is $x=9$.
Also, recall that lines of the form $x=c$ where $c$ is a constant are vertical lines.
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 2 - Section 2.4 - Linear Functions - 2.4 Exercises - Page 211: 2
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