SOLUTION: Do exponential functions only model phenomena that grow, or can they also model phenomena that decay? Explain what is different in the form of the function in each case.

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Question 155054: Do exponential functions only model phenomena that grow, or can they also model phenomena that decay? Explain what is different in the form of the function in each case.
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
Exponential function can depict both growth and decay.
An example of a growth function: f%28x%29+=+a%5Ex
An example of a decay: f%28x%29+=+a%5E%28-x%29
Here are the graphs of both growth (red graph) and decay (green graph) functions:
graph%28400%2C400%2C-3%2C3%2C-2%2C10%2C5%5Ex%2C+5%5E%28-x%29%29