If the base of the exponential function is smaller than 1, then the function represents exponential decay. If the base is greater than 1, then the function represents exponential growth.

For this function we note that the base is 0.6(< 1) and thus the function represents exponential decay.

The percentage rate of change is the (positive) difference between 100% and the base:

\(\displaystyle{\left|{100}\%-{0.6}\right|}={\left|{100}\%-{60}\%\right|}={40}\%\)

For this function we note that the base is 0.6(< 1) and thus the function represents exponential decay.

The percentage rate of change is the (positive) difference between 100% and the base:

\(\displaystyle{\left|{100}\%-{0.6}\right|}={\left|{100}\%-{60}\%\right|}={40}\%\)