# Chapter 2 Linear Equations and Functions - 2.2 Find Slope and Rate of Change - 2.2 Exercises - Problem Solving - Page 88: 47a

$\frac{3}{8}.$

#### Work Step by Step

By using the slope formula, the slope of the roof is: $m=\frac{y_2-y_1}{x_2-x_1}=\frac{15}{40}=\frac{3}{8}.$

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