Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 5 - Linear Functions - Chapter Review: 4

Answer

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×−1/a=−1.
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