Practice!

Sample Problem

Is this the correct graph of e0.84x?

Yes

No

If so, is it:

An exponential growth function

An exponential decay function

It is not the correct graph

Solution

 e0.84x

Plug  x= -2, e=2.718 to get e0.84x=0.19;

Plug  x= 1, e=2.718 to get e0.84x=2.32

The points given on the graph correctly fit the equation. This is the correct graph.

Because r is positive, this is an exponential growth function.