Introductory Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-805-X
ISBN 13: 978-0-13417-805-9

Chapter 3 - Section 3.3 - Slope - Exercise Set - Page 242: 29


not perpendicular

Work Step by Step

m=$\frac{y_2-y_1}{x_2-x_1}$ m=$\frac{-6-9}{-1-2}$ m=$\frac{-15}{-3}$ m=5 m=$\frac{y_2-y_1}{x_2-x_1}$ m=$\frac{-1-3}{-15-5}$ m=$\frac{-4}{-20}$ m=$\frac{1}{5}$ 5$\times$$\frac{1}{5}$$\ne$-1 Therefore the lines are not perpendicular.
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