Algebra and Trigonometry 10th Edition

Published by Cengage Learning
ISBN 10: 9781337271172
ISBN 13: 978-1-33727-117-2

Chapter 2 - 2.1 - Linear Equations in Two Variables - 2.1 Exercises - Page 170: 69



Work Step by Step

Slope of Line 1 : $m_1=\frac{y_2-y_1}{x_2-x_1}=\frac{-1-9}{0-5}=\frac{-10}{-5}=2$ Slope of Line 1 : $m_2=\frac{y_2-y_1}{x_2-x_1}=\frac{3-1}{0-4}=\frac{2}{-4}=-1/2$ Hence both lines are perpendicular as $m_1 * m_2 = -1$
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