Question

What is the equation of the quadratic graph with a focus of (3, −1) and a directrix of y = 1?

f(x) = −one fourth (x − 3)2 + 1
f(x) = −one fourth (x − 3)2
f(x) = one fourth (x − 3)2 + 1
f(x) = one fourth (x − 3)2