#### Answer

Exponential function

#### Work Step by Step

If the function is in the form $y=a*b^x$, the function represents an exponential function.
We have $a=4, b=5,$ and $x=x,$ so this rule does represent an exponential function.

Published by
Prentice Hall

ISBN 10:
0133500403

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

Exponential function

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