Answer
$k>0; k<0$
Work Step by Step
If $k>0,$ the function models the amount or size of a growing entity. If $k<0,$ then the function amount or size of a decaying entity.
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 9 - Section 9.6 - Exponential Growth and Decay; Modeling Data - Concept and Vocabulary Check - Page 739: 1
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