SOLUTION: Write an equation for the parabola with focus (4,0) and directrix y=2. Thanks!

Question 458635: Write an equation for the parabola with focus (4,0) and directrix y=2.
Thanks!
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
Write an equation for the parabola with focus (4,0) and directrix y=2.
Thanks!
..
Standard form of parabola: (x-h)^2=4p(y-k), with (h,k) being the (x,y) coordinates of the vertex
Given parabola opens downward with axis of symmetry at x=4. Vertex at (4,1). p=1
Equation of parabola:
(x-4)^2=-4(y-1) (ans)
see the graph below as a visual check on the answer
..
y=1-(x-4)^2/4

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