Question

Hey y'all! :-)

I just need help with a couple questions, one of them being:

Derive the equation of the parabola with a focus at (2, 4) and a directrix of y = 8.

Answer choices:
a. f(x) = - one eighth (x - 2)^2 + 6
b. f(x) = one eighth (x - 2)^2 + 6
c. f(x) = - one eighth (x + 2)^2 + 8
d. f(x) = one eighth (x + 2)^2 + 8

Answer 1

Hey Nicole c:

Where we gettin stuck on this one?
I could lead you through it the long way, I can't remember the nice shortcut methods though :o(

Answer 2

@zepdrix just confused how to even do the problem overall! sorry if that's a lot to ask haha

Answer 3

So here is our directrix and focus point graphed.