SOLUTION: What is an equation of a parabola with a vertex at the origin and directrix x = 4.75?

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Question 723662: What is an equation of a parabola with a vertex at the origin and directrix x = 4.75?
Answer by lwsshak3(11628) About Me  (Show Source):
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What is an equation of a parabola with a vertex at the origin and directrix x = 4.75?
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This is a parabola that opens leftward:
Its basic equation: (y-k)^2=-4p(x-h), (h,k)=(x,y) coordinates of the vertex
vertex: (0,0)
axis of symmetry: x-axis or y=0
p=4.75 (distance from vertex to directrix on the axis of symmetry)
4p=19
Equation of given parabola: y^2=-19x