SOLUTION: what is the directx of 8x=y^2

Question 467998: what is the directx of 8x=y^2
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
what is the directrix of 8x=y^2
..
Standard form for given parabola; (y-k)^2=4p(x-h), with (h,k) being the (x,y) coordinates of the vertex.
For given parabola: y^2=8x
vertex is at origin (0,0), parabola opens rightwards
4p=8
p=4
Directrix is a vertical line 4 units from the vertex at x=-4
see graph below as a visual check on answer
..
y=�(8x)^.5

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