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    Eithan's Avatar
    Eithan Posts: 1, Reputation: 1
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    #1

    May 15, 2012, 02:51 PM
    Find vertex, focus, and directrix of the parabola
    y=16x-2x^2 3
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #2

    May 17, 2012, 06:02 AM
    Quote Originally Posted by Eithan View Post
    y=16x-2x^2 3
    Convert this equation to the standard from for a parabola:



    This will give you the vertex (x1,y1), the focus (which is a distance p from the vertex, inside the parabola), and the directrix (a line that is also a distance p from the vertex, but on the outside of the parabola). Post back with your answer and we'll check it for you.
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