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Math Help - Parabola and Directrix and Focus.

  1. #1
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    Parabola and Directrix and Focus.

    For the parabola y = x^2

    I have determined that the focus is the point (0, 1/4)

    I have determined that the directrix is the line y = -1/4

    Am I correct?
    Last edited by mr fantastic; November 15th 2010 at 02:19 PM. Reason: Edited title.
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  2. #2
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    Quote Originally Posted by MATNTRNG View Post
    For the parabola y = x^2

    I have determined that the focus is the point (0, 1/4)

    I have determined that the directrix is the line y = -1/4

    Am I correct? Yes
    ...
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