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Math Help - having trouble imaganing this graph

  1. #1
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    having trouble imaganing this graph

    in a 3d space
    a shape which is created by x=y y=0 z=0
    and z=4-x^2

    specially the last one i dont know what is z=4-x^2
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  2. #2
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    Re: having trouble imaganing this graph

    Quote Originally Posted by transgalactic View Post
    in a 3d space
    a shape which is created by x=y y=0 z=0
    and z=4-x^2

    specially the last one i dont know what is z=4-x^2
    Take any value for y. For example y=0. Then z=4-x^2 represents a parabola in the plane y=0 with vertex (0,0,4). Hope you can sketch this parabola. Now take another value for y. Say y=1. Then you have another parabola with the same shape (vertex at (0,1,4)) but on the y=1 plane. Likewise we can choose any value for y. So this represents a parabolic surface,with the vertex as the y axis.
    Attached Thumbnails Attached Thumbnails having trouble imaganing this graph-sp.bmp  
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  3. #3
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    Re: having trouble imaganing this graph

    the attached photo is not appearing could you post a link?
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  4. #4
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    Re: having trouble imaganing this graph

    Quote Originally Posted by transgalactic View Post
    the attached photo is not appearing could you post a link?
    Strange. I can see it. But anyway here I have attached it again as a pdf.
    Attached Files Attached Files
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