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.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.