Intermediate Algebra (6th Edition)

Published by Pearson
ISBN 10: 0321785045
ISBN 13: 978-0-32178-504-6

Chapter 3 - Section 3.2 - Introduction to Functions - Vocabulary, Readiness & Video Check - Page 139: 9

Answer

The vertical line test shows if any x value does not correspond to exactly one y value.

Work Step by Step

If a given x value corresponds to two y values, then for that given value x, there will be 1 point directly above another point. Consequently, a vertical line would go through two points in this scenario. Thus, if there are two or more y values corresponding to a given x value, a vertical line will intersect the graph at multiple points.
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