Algebra 1: Common Core (15th Edition)

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

Chapter 5 - Linear Functions - 5-6 Parallel and Perpendicular Lines - Practice and Problem-Solving Exercises - Page 334: 13

Answer

Perpendicular

Work Step by Step

Lines are perpendicular when the slopes of the two lines are opposite reciprocals. In this case, 1 and -1 are opposite reciprocals, so we know that the two lines are perpendicular.
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