Answer:f(x) = 4x - 5
f(3+h) = 4(3+h) - 5
= 12 + 4h - 5
= 4h + 7
f(3) = 4(3) - 5
= 12 - 5
= 7
Now, substitute these values into the expression (f(3+h) - f(3))/h:
(f(3+h) - f(3))/h = ((4h + 7) - 7)/h
= (4h)/h
= 4
So, (f(3+h) - f(3))/h = 4.
