Parallel and Perpendicular Lines In Exercises69–72, determine whether the lines L1 and L2 passingthrough the pairs of points are parallel, perpendicular,or neither.69. L1: (0, −1), (5, 9) 70. L1: (−2, −1), (1, 5)L2: (0, 3), (4, 1) L2: (1, 3), (5, −5)71. L1: (−6, −3), (2, −3) 72. L1: (4, 8), (−4, 2)L2: (3, −12), (6, −12) L2: (3, −5), (−1, 13)

College Algebra
10th Edition
ISBN:9781337282291
Author:Ron Larson
Publisher:Ron Larson
Chapter2: Functions And Their Graphs
Section2.1: Linear Equations In Two Variables
Problem 72E
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Parallel and Perpendicular Lines In Exercises
69–72, determine whether the lines L1 and L2 passing
through the pairs of points are parallel, perpendicular,
or neither.
69. L1: (0, −1), (5, 9) 70. L1: (−2, −1), (1, 5)
L2: (0, 3), (4, 1) L2: (1, 3), (5, −5)
71. L1: (−6, −3), (2, −3) 72. L1: (4, 8), (−4, 2)
L2: (3, −1
2), (6, −1
2) L2: (3, −5), (−1, 1
3)

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