Answer
(a) No
(b) Yes
Work Step by Step
(a) This is not a function, for it fails the vertical line test.
(b) Since the bottom half is cut off, it will no longer fail the vertical line test, so it is a function.
Functions Modeling Change: A Preparation for Calculus, 5th Edition
by Connally, Eric; Hughes-Hallett, Deborah; Gleason, Andrew M.; Cheifetz, Phil C.
Published by
Wiley
ISBN 10:
1118583191
ISBN 13:
978-1-11858-319-7
Chapter 1 - Linear Functions and Change - Review Exercises and Problems for Chapter One - Page 52: 1
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