Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 3 - Section 3.6 - Graphing Linear Inequalities in Two Variables - Exercise Set: 41

Answer

Using a point on the boundary line will be give the needed information to know which region must be shaded as the inequality's solution set.

Work Step by Step

A point on the boundary line should not be used as a test point because regardless of whether it results to a true or a false statement, there will be not enough information to know which region must be shaded.
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