Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 5 - Linear Functions - 5-6 Parallel and Perpendicular Lines - Practice and Problem-Solving Exercises - Page 331: 28

Answer

Always

Work Step by Step

Horizontal lines have the same y-values. The x-axis has values of y = 0, and that is the same value. Thus, horizontal lines are parallel to the x-axis.
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