#### Answer

$5$

#### Work Step by Step

In an exponential function of the form $y=a\times b^x$, $b$ represents the growth factor. In the equation $y=0.2\times5^x$, $5$ takes the place of $b$, so $5$ is the growth factor.

Published by
Prentice Hall

ISBN 10:
0133500403

ISBN 13:
978-0-13350-040-0

$5$

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