Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 2 Linear Equations and Functions - 2.3 Graph Equations of Lines - 2.3 Exercises - Quiz for Lessons 2.1-2.3 - Page 96: 4



Work Step by Step

By using the slope formula, the slopes of the lines are: $m_1=\frac{y_2-y_1}{x_2-x_1}=\frac{-7-9}{-3-1}=\frac{-16}{-4}=4.$ $m_2=\frac{y_2-y_1}{x_2-x_1}=\frac{-4-(-2)}{-1-0}=\frac{-2}{-1}=2.$ Since $m_1m_2\ne-1$ and $m_1\ne m_2$, they are neither.
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