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Math Help - TI83 graphing table help!

  1. #1
    mikevisoni
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    TI83 graphing table help!

    Im having a problem with my TI 83 and the way i set it up

    I use the equation Y1=-.000234(30)^2+.01404(30) i press graph and it does the smallest parabola in the world, I need to be able to see it mroe properly, and the table always displays the Y as .2106 no matter what the X is, which must be wrong, considering .2106 is only supposed to be the maximum of the parabola. I try pressing zoom in and zoom out on graph but it wotn work and i have no idea how to work the "Window" setup and option, So can some one explain a way for me to see the graph and fix the table on my calc? Or maybe see if i messed up on the equation or something?o.0
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  2. #2
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    earboth's Avatar
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    Quote Originally Posted by mikevisoni View Post
    Im having a problem with my TI 83 and the way i set it up

    I use the equation Y1=-.000234(30)^2+.01404(30) i press graph and it does the smallest parabola in the world, I need to be able to see it mroe properly, and the table always displays the Y as .2106 no matter what the X is, which must be wrong, considering .2106 is only supposed to be the maximum of the parabola. I try pressing zoom in and zoom out on graph but it wotn work and i have no idea how to work the "Window" setup and option, So can some one explain a way for me to see the graph and fix the table on my calc? Or maybe see if i messed up on the equation or something?o.0
    Hi,

    I hope this reply doesn't come too late:

    Look at your equation: You don't have any x in it only constant values. Your calculator therefore draws a parallel to x-axis.

    To type the variable x in the equation you have to use the \boxed{x,T,\theta,n}-key.
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