What is the average rate of change of the function f (x) = 2^x-3 from x=4 and x=6?

f (x) = 2^x-3

f (6) = 2^x-3

f (6) = 2^6-3

f (6) = 64-3 = 61

f (4) = 2^ 4-3

f (4) = 16-3

f (4) = 13

average rate of change = change in f (x) / change in x

= (61-13) / (6-4)

=48/2

=24