SOLUTION: Find the equaiton in standard form of the parabola with the directrix x = 3 and vertex (1,-2)

Question 857850: Find the equaiton in standard form of the parabola with the directrix x = 3 and vertex (1,-2)
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Find the equaiton in standard form of the parabola with the directrix x = 3 and vertex (1,-2)
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Sketch a picture of the directrix and the vertex.
Since the vertex is to the left of a vertical directrix,
the parabola form is (y-k)^2 = 4p(x-h) where 4p is negative.
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p = 1-3 = -2
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(y-k)^2 = 4p(x-h)
(y+2)^2 = -8(x-1)
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Cheers,
Stan H.
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