Answer
This value of $r$ is unreasonable.
Work Step by Step
A value of $r=1$ would signify all the points lying on an upward sloping line. This line goes downward, so $r=1$ would be unreasonable.
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 - 1.6 Fitting Linear Functions to Data - Exercises and Problems for Section 1.6 - Exercises and Problems - Page 50: 1
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