How do you determine if #y=0.2(5)^-x# is an exponential growth or decay?
1 Answer
Jan 17, 2017
This is exponential decay. Two ways to tell are discussed below...
Explanation:
First, the negative exponent is an indicator of decay. You could rewrite the expression (without a negative exponent) as
This helps you to see that as
Alternatively, you could make a chart in which you test increasing values of