# Chapter 2 - Graphs and Functions - Chapter 2 Test Prep - Review Exercises: 26

The given equation does not define $y$ as a function of $x$.

#### Work Step by Step

For each value of $x$, the equation gives two values of $y$. Example: When $x=3$, the possible values of $y$ are $3$ and $-3$. Therefore, the given equation does not define $y$ as a function of $x$.

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.