## Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)

Published by Pearson

# Chapter 1 - Functions and Their Graphs - Section 1.1 Functions - 1.1 Assess Your Understanding - Page 54: 23

#### Answer

$\text{not a function}$

#### Work Step by Step

A relation is a function if each element in the first set is associated with exactly one element in the second set. This relation isn't a function as there are two ordered pairs, $(-2,4)$ and $(-2,6)$, that have the same first element but different second elements.

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