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Calculators Ti 89 Graphing help

  1. Dec 17, 2009 #1
    So I have a project due tomorrow and I really need to use a caculator and Mine won't work right.

    When insert

    It saids its not an algebraic expression how do I fix that.
    I try it with an ti 84 and it worked.
  2. jcsd
  3. Dec 17, 2009 #2


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    Gold Member

    Have you tried clearing your variables? Maybe try something other that x, such as y, z, t, or even xy (which is not the same as x*y).
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