Answer
not a function
Work Step by Step
Use the vertical line test, that is, any vertical line should cross the graph only once. The vertical line x= 4 crosses the graph twice and hence it is not a function.
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 2 - 2.3 - Analyzing Graphs of Functions - 2.3 Exercises - Page 194: 13
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