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Math Help - graphs

  1. #1
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    graphs

    I am supposed to sketch y = x^2 + z^2. Please help.
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  2. #2
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    on the 3 dimensional axis or is z just a parameter?
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  3. #3
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    3 dimensional axis
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  4. #4
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    well this is just a paraboloid opening along the y axis, it is circular since the coefficient on x^2 and z^2 is the same

    http://content.answers.com/main/cont...4/THpbloid.jpg
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