9514 1404 393
Answer:
5
Explanation:
For an exponential function of the form ...
f(x) = a·b^x
the "multiplicative rate of change" or "growth factor" is the base of the exponential term: b.
Comparing this form to your function, we see that ...
f(x) = 2·5^x
a = 2, b = 5
The multiplicative rate of change is 5.