rathfam5
Jun 28, 2009, 08:04 AM
What is the equation of a parabola with a vertex at (4,8) and a directrix at y=5?
I calculated the distance from the vertex to the directrix as p=3.
my answer key says p=6. I cannot see were I went wrong. Can anyone provide some guidance?
If p=3 is correct then the equation would be:
Focus = (4,11)
(x-h)^2 = 2p(y-k)
(x-4)^2 = 6(y-8)
Thanks in advance!
I calculated the distance from the vertex to the directrix as p=3.
my answer key says p=6. I cannot see were I went wrong. Can anyone provide some guidance?
If p=3 is correct then the equation would be:
Focus = (4,11)
(x-h)^2 = 2p(y-k)
(x-4)^2 = 6(y-8)
Thanks in advance!