Question

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

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 1

As a start : find the vertex of parabola