Answer
vertical
Work Step by Step
The Vertical Line Test can be used to determine whether or not a relation is a function. If a vertical line can touch a graph in at least two places, then the relation is NOT a function.
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 9 - Section 9.2 - Inverse Functions - Vocabulary, Readiness & Video Check - Page 549: 5
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