SOLUTION: Write an equation of a parabola with the given focus and directx. focus (0, 3); directx: y = -1

Algebra ->  Quadratic-relations-and-conic-sections -> SOLUTION: Write an equation of a parabola with the given focus and directx. focus (0, 3); directx: y = -1      Log On


   

Question 860759: Write an equation of a parabola with the given focus and directx.
focus (0, 3); directx: y = -1
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

focus (0, 3); directx: y = 1  C(0,2), p = 1

y = ax^2 + 2

p = 1

a = 1%2F%284p%29+=+1%2F4

y = (1/4)x^2 + 2