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: 39



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 $(-2/9,5/18)$ and $(1/18,-5/9)$: $slope=m=\displaystyle \frac{y_{2}-y_{1}}{x_{2}-x_{1}}=\frac{-5/9-5/18}{1/18--2/9}=\frac{-10/18-5/18}{1/18+4/18}=\frac{-15/18}{5/18}=\frac{-15}{5}=-3$
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