## Thinking Mathematically (6th Edition)

Published by Pearson

# Chapter 7 - Algebra: Graphs, Functions, and Linear Systems - 7.1 Graphing and Functions - Exercise Set 7.1: 56

#### Answer

$y$ is a function of $x$

#### Work Step by Step

RECALL: If all vertical lines pass through the graph one time at the most, then the graph represents $y$ as a function of $x$. Notice that all vertical lines will pass through the graph at exactly one point only. Thus, the given graph represents $y$ as a function of $x$.

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