Write an equation for a parabola with a vertex at the origin and a focus at ( -4,0 ).

Question

a) 𝑦 = −1/4𝑥2
b) 𝑦 = − 1/16x2
c) 𝑥 = − 1/4y2
d) 𝑥 = −1/16y2

I think it's A. Any help?

Answer 1

i think a is right