Big Ideas Math - Algebra 1, A Common Core Curriculum

Published by Big Ideas Learning LLC
ISBN 10: 978-1-60840-838-2
ISBN 13: 978-1-60840-838-2

Chapter 4 - Writing Linear Functions - 4.3 - Writing Equations of Parallel and Perpendicular Lines - Exercises - Page 192: 33

Answer

Never true.

Work Step by Step

The slopes of perpendicular lines are negative reciprocals. This means that if slope of the given line is positive, the perpendicular line must be negative. So, two lines with positive slopes can never be perpendicular to each other.
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