Answer:
Explanation:
a) So to find f(4) while looking at a graph we are looking for the value of a function at the point where x = 4. So if we have this big curvy line or whatever it may be, the value of that function at x = 4 would be the value of f(4)
b)
So, just plug the value for x in the function each time.
f(4) = -4(4-2)^2 + 11 = -5
f(1) = -4(1-2)^2 + 11 = 7
f(4) + f(1)
-5 + 7 = 2