Answer
Perpendicular.
Work Step by Step
Since the two lines have opposite reciprocal slopes ($4\ and \ -\frac{1}{4}$), we see that the lines must be perpendicular.
Functions Modeling Change: A Preparation for Calculus, 5th Edition
by Connally, Eric; Hughes-Hallett, Deborah; Gleason, Andrew M.; Cheifetz, Phil C.
Published by
Wiley
ISBN 10:
1118583191
ISBN 13:
978-1-11858-319-7
Chapter 1 - Linear Functions and Change - 1.4 Formulas for Linear Functions - Exercises and Problems for Section 1.4 - Exercises and Problems - Page 35: 32
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