Recent content by SyN65

  1. S

    Calculators TI-89 question (graphing x and y)

    Basically I have to graph x and y but the 89 isn't letting me. x = -y^2 y = x + 20 I'm sure I have to be in a specific mode or something - I tried function and parametric but neither worked and give me the error "Undefined Variable". Any help would be much appreciated. :smile:
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