Precalculus (10th Edition)

Published by Pearson
ISBN 10: 0-32197-907-9
ISBN 13: 978-0-32197-907-0

Chapter 5 - Exponential and Logarithmic Functions - 5.2 One-to-One Functions; Inverse Functions - 5.2 Assess Your Understanding - Page 269: 105

Answer

The horizontal-line test can be used to determine if a function is a one-to-one function because if every horizontal line intersects the function exactly once, then for every $y$ value of the function, there is a unique $x$ value.

Work Step by Step

The horizontal-line test can be used to determine if a function is a one-to-one function because if every horizontal line intersects the function exactly once, then for every $y$ value of the function, there is a unique $x$ value.
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