Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 5 - Linear Functions - Chapter Review - Chapter Vocabulary - Page 349: 4


Opposite reciprocals

Work Step by Step

Two lines are perpendicular if the product of their slopes is $-1$. The only way we can guarantee that a product is $-1$ is if we have opposite reciprocals, because $a\times-\frac{1}{a}=-1$
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