SOLUTION: Find the standard form of a parabola with vertex (0,0) and directrix x=7

Question 612351: Find the standard form of a parabola with vertex (0,0) and directrix x=7
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
Find the standard form of a parabola with vertex (0,0) and directrix x=7
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This is a parabola that opens leftwards.
Its standard form of equation: (y-k)^2=-4p(x-h), (h,k)=(x,y) coordinates of the vertex
For given parabola:
vertex (0,0) (given)
axis of symmetry: x-axis or y=0
p=7 (distance from directrix to vertex on the axis of symmetry.
4p=28
Equation: y^2=-28x
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