Question

Derive the equation of the parabola with a focus at (2, 4) and a directrix of y = 8.

Answer 1

I got the second part, f(x) = ?(x-2)^2+6 I just need the first part.

Answer 2

Answers:
f(x) = −one eighth (x − 2)2 + 6
f(x) = one eighth (x − 2)2 + 6
f(x) = −one eighth (x + 2)2 + 8
f(x) = one eighth (x + 2)2 + 8

Answer 3

never mind.

Answer 4

The answer was A.