## Precalculus (10th Edition)

Published by Pearson

# Chapter 1 - Graphs - 1.3 Lines - 1.3 Assess Your Understanding - Page 30: 1

undefined; zero

#### Work Step by Step

The slope of a vertical line is undefined and the line is of the form $x=c$ The slope of a horizontal line is zero and the line is of the form $y=0\times x+c=c$

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