Intermediate Algebra (12th Edition)

Published by Pearson
ISBN 10: 0321969359
ISBN 13: 978-0-32196-935-4

Chapter 2 - Section 2.2 - The Slope of a Line - 2.2 Exercises - Page 158: 40



Work Step by Step

To calculate the slope between points $(x_1,y_1)$ and $(x_2,y_2)$, we use the formula: $slope=m=\frac{y_2-y_1}{x_2-x_1}$ We use the formula to find the slope between the points $(-4/5,9/10)$ and $(-3/10,1/5)$: $slope=m=\displaystyle \frac{y_{2}-y_{1}}{x_{2}-x_{1}}=\frac{1/5-9/10}{-3/10--4/5}=\frac{2/10-9/10}{-3/10+8/10}=\frac{-7/10}{5/10}=\frac{-7}{5}$
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