Question

Luis saved $15. He doubles the amount he saves each week. Does this represent an exponential function? Why or why not?

Answer 1

Answer: This DOES NOT represent an exponential function, because his savings increase by a constant RATE.

Explanation: An exponential function is one that increases by the power raised to a constant number. The variable in an exponential function is the power of a constant.

Here Luis is increasing his savings with a constant rate of two times. He is doubling his savings every week and therefore the growth will not be called exponential growth.