College Algebra (10th Edition)

Published by Pearson
ISBN 10: 0321979478
ISBN 13: 978-0-32197-947-6

Chapter 2 - Section 2.3 - Lines - 2.3 Assess Your Understanding: 8

Answer

$-\dfrac{1}{2}$

Work Step by Step

RECALL: Perpendicular lines have slopes whose product is $-1$. Thus, the two lines are perpendicular if $a=-\dfrac{1}{2}$ since $2(-\frac{1}{2})=-1$.
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