Question 16720
we know f(x) = 5x + 3
also, f(2) = 5(2) + 3 = 13
f(x) - f(2) = 5x + 3 - 13 = 5x -10

now {{{(f(x) - f(2))/(x - 2)}}} = {{{(5x-10)/(x-2)}}} = {{{((5)(x-2))/(x-2)}}}
now cancel x - 2 in both the numberator and denominator to get 5.
Hope this helps Sandy.