Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 4 - Inverse, Exponential, and Logarithmic Functions - 4.1 Inverse Functions - 4.1 Exercises - Page 416: 14


not one-to-one

Work Step by Step

See p.407, Horizontal Line Test A function is one-to-one if every horizontal line intersects the graph of the function at most once. ------------- We find many horizontal lines that intersect the graph more than once. One line is enough to fail the test. so we take the x-axis ($y=0)$. Horizontal Line Test: FAIL. The function is not one-to-one.
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