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    nmstar56's Avatar
    nmstar56 Posts: 1, Reputation: 1
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    #1

    Dec 9, 2009, 08:54 PM
    find a vertex of parabola with only yint and a point.
    I'm given the vertex: (x,6.17)
    y-Int: (0,5)
    One x-int: (10.42, 0)

    How do I find the rest of the vertex, and then find the equation for the parabola.
    galactus's Avatar
    galactus Posts: 2,271, Reputation: 282
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    #2

    Dec 10, 2009, 11:22 AM
    Quote Originally Posted by nmstar56 View Post
    I'm given the vertex: (x,6.17)
    y-Int: (0,5)
    One x-int: (10.42, 0)

    How do I find the rest of the vertex, and then find the equation for the parabola.
    There are various ways to appproach this, but you could use



    Where h and k are the vertex coordinates. Plug in your knowns and solve for h and a.





    Solve for a and h.
    galactus's Avatar
    galactus Posts: 2,271, Reputation: 282
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    #3

    Dec 15, 2009, 06:56 AM

    Thanks, Unknown. You thought it was nice, but the poster must've have thought so because they never responded back.
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #4

    Dec 15, 2009, 07:20 AM

    That's how most of them are, look for an answer, never to look if they got an answer or not. I'm sure most of them think they'll get the answer a second after they post their question :rolleyes:
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