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Math Help - Cartesian coordinate: Z axis

  1. #1
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    Cartesian coordinate: Z axis

    Where is the z axis on a Cartesian coordinate? I googled it and some graphs show the Z axis where the Y axis is.
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  2. #2
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    Quote Originally Posted by HSS8 View Post
    Where is the z axis on a Cartesian coordinate? I googled it and some graphs show the Z axis where the Y axis is.
    http://www.flashandmath.com/advanced/simple3d/pic1c.jpg
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  3. #3
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    Quote Originally Posted by HSS8 View Post
    Where is the z axis on a Cartesian coordinate? I googled it and some graphs show the Z axis where the Y axis is.
    The picture above is a good illustration of a 3-dimensional graph. Because we can only draw things in 2-dimensions (normally), we have to sort of use our imaginations and depth tricks with a drawing to create the third axis. In the illustration, the regular x-y graph has been turned sideways and then directed towards the observer, creating the feel that the x-axis is coming out towards you and the y axis rests along the width of the page. The z-axis, then, becomes the axis that runs along the height of the page.
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