Answer
See the explanation.
Work Step by Step
If the inequality sign is $>$ or $<$ then we use a dashed line since points on it are not included.
If the inequality sign is $\geq$ or $\leq$ then we use a solid line since points on it are included.
College Algebra (11th Edition)
by Lial, Margaret L.; Hornsby John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
0321671791
ISBN 13:
978-0-32167-179-0
Chapter 5 - Section 5.6 - Systems of Inequalities and Linear Programming - 5.6 Exercises - Page 541: 19
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