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-   -   How do you work out the equation of any parabolas? (https://www.askmehelpdesk.com/showthread.php?t=370729)

  • Jun 30, 2009, 05:07 PM
    zael
    how do you work out the equation of any parabolas?
    It is an upside down parabola. Vertex is (600, 50) ?
  • Jul 1, 2009, 07:08 AM
    Unknown008

    There are several methods. One of the simplest may be the completed squared form;



    where (b,c) is the coordinates of the vertex.

    In your case, the formula will be



    The negative sign in front of the 'a' indicates that the parabola is 'upside down'
    If another point besides the vertex were given, you can work out the value of a by replacing x and y by the respective given coordinates.
  • Jul 3, 2009, 09:21 PM
    zael
    Thanks:)
  • Jul 4, 2009, 08:26 AM
    Unknown008

    You're welcomed! :)

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