# Chapter 3 - Section 3.4 - The Slope of a Line - Exercise Set: 25

$l_{2}$

#### Work Step by Step

As the box on pg. 158 shows, lines that are slanted downward like $l_{1}$ have a negative slope and horizontal lines like $l_{2}$ have a slope of zero. Therefore, horizontal lines must have a greater slope than downward slanted lines, so we know that $l_{2}$ has a greater slope.

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