Answer:
(4, -25)
Step-by-step explanation:
The function is put into this form: f(x)= Ax^2 + Bx + C
In the equation x^2 - 8x - 9, A is 1, B is -8 and C is -9
The negatives cancel for negative B so 8 is positive.
8/ 2(1) = 4
Now we plug 4 into the function as x to find the y value
4^2 - 8(4) - 9
-25
