Answer
$ y=2.5e^{x\ln 0.7}$, $ y=2.5e^{-0.357x}$
Work Step by Step
$ y=ab^{x}$ is equivalent to $ y=ae^{x\ln b}$
$ y=2.5(0.7)^{x}$ is equivalent to $ y=2.5e^{x\ln 0.7}$
With $\ln 0.7\approx-0.357,$
$ y=2.5e^{-0.357x}$
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13446-914-3
ISBN 13:
978-0-13446-914-0
Chapter 3 - Section 3.5 - Exponential Growth and Decay; Modeling Data - Exercise Set - Page 508: 59
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