Answer
in 1999, 28.3 miles per gallon
Work Step by Step
the average fuel economy was the lowest in 1999, it was 28.3
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 3 - Section 3.4 - Slope and Rate of Change - Exercise Set - Page 241: 77
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