What is the average rate of change of the function f(x)=20(14)xf(x)=20(14)x from x = 1 to x = 2? enter your answer, as a decimal, in the box. do not round your answer.

Average rate of change(A(x)) of f(x) over a interval [a,b] is given by:

Given the function:

We have to find the average rate of change from x = 1 to x= 2

At x = 1

then;

At x = 2

then;

Substitute these in above formula we have;

⇒

therefore, average rate of change of the function f(x) from x = 1 to x = 2 is, -3.75