Question

Which equation represents a parabola that has a focus of (0,0) and a directix of y = 2?​

Answer 1

Answer: D

Explanation:

`a=0,\ b=0,\ k=2\\equation\ of\ the\ parabola:\\\\y=((x-a)^2)/(2(b-k)) +(b+k)/(2) \\\\\\y=-(x^2)/(4)+1 \\\\x^2=-4(y-1)\\\\Answer\ D`