Question

Derive the equation of the parabola with a focus at (0, 1) and a directrix of y = −1.

f(x) = −one fourth x^2

f(x) = one fourth x2

f(x) = −4x^2

f(x) = 4x^2

Answer 1

I extremely need help on a couple problems like these

Answer 2

right now i think its the first one...