Answer:
8
Step-by-step explanation:
Given,
f(x) = 8(x)
To value of a function at any point can be calculated by substituting that value in place of x.
Therefore,
f(1) = 8(1) = 8
f(2) = 8(2) = 16
The change over the interval from x=1 to x=2 can be calculated using [tex]\frac{f(2) - f(1)}{2-1}[/tex]
=> [tex]\frac{16 - 8}{1}[/tex]
=> 8
