Answer
See below.
Work Step by Step
a) If $y$ is the federal income, $x$ is the tax, then $y=f(x)$ is a function.
b) If $y$ is the lot size, $x$ is the price of the house, then $y=f(x)$ is not a function.
College Algebra (6th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-32178-228-3
ISBN 13:
978-0-32178-228-1
Chapter 2 - Functions and Graphs - Exercise Set 2.1 - Page 228: 116
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