## Precalculus (6th Edition)

Published by Pearson

# Chapter 2 - Graphs and Functions - Chapter 2 Test Prep - Review Exercises - Page 297: 46

#### Answer

$y=0$.

#### Work Step by Step

RECALL: The graph of the equation $y=k$ is a horizontal line whose y-intercept is $(0, k)$. Every point on the line has a y-coordinate of $k$. Note that the x-axis is horizontal, and every point on the x-axis has a y-coordinate of $0$. Thus, the equation of the line that lies along the x-axis is $y=0$.

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