What is the equation of the quadratic graph with a focus of (8, −8) and a directrix of y = −6?


f(x) = −one fourth (x − 7)2 + 1

f(x) = −one fourth (x − 8)2

f(x) = −one fourth (x − 8)2 − 7

f(x) = one fourth (x − 7)2

I think its the third one but im not sure