Answer
-2.5
Work Step by Step
The equation for the slope of a line is:
$$m=\frac{y_2-y_1}{x_2-x_1}=\frac{-3-7}{5-1}=-2.5$$
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 2 Linear Equations and Functions - Chapter Review - Exercises - Page 142: 10
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