Answer
a. Yes. Yes. No. Yes.
b.
Work Step by Step
The graph of $S$ is the line $x=y$ with the lower portion shaded in, because $x\geq y$ for all these points in the Cartesian plane.
Discrete Mathematics with Applications 4th Edition
by Epp, Susanna S.
Published by
Cengage Learning
ISBN 10:
0-49539-132-8
ISBN 13:
978-0-49539-132-6
Chapter 1 - Speaking Mathematically - Exercise Set 1.3 - Page 21: 5
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