Using the exponential function 2^x + 3, what is the average rate of change between the values 1 ≤ x ≤ 5?

Answer 1

f(1) = 5

f(5) = 35

(35 - 5) / (5 - 1) = ?

Answer 2

that would, of course, be ∆y/∆x =
f(5)-f(1)
------------- = ((2^5+3)-(2^1+3))/4 = (35-5)/4 = 15/2
5-1