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Math Help - Graphing an ellipse

  1. #1
    Junior Member
    Joined
    Jan 2011
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    Graphing an ellipse

    Hello

    Now I know that a circle isnt a function but buy using
    y=(r^2-x^2)^0.5 and y=-(r^2-x^2)^0.5 one can be drawn on a graphing program.

    Is there a way to do a similar thing but with an oval or ellipse (I want the ellipse to be vertical not horizontal)
    x2 y2
    -- + --- = 1

    a2 b2
    is all I could find relating to the graph of an ellipse but I am looking for something that has y=............ so I can enter it into the graphing program

    Thank you!
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  2. #2
    MHF Contributor
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    Re: Graphing an ellipse

    Solving for y gives you y=\pm b\sqrt{1-\frac{x^2}{a^2}}.
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