## Precalculus (6th Edition)

Published by Pearson

# 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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