Question about Texas Instruments TI-89 Calculator
When you graph a function and press F4, it will clear up giving you an empty coordinate graph. Mine won't go away. I can still graph other functions, but this one won't go away
If you [green diamond] key and [F1 y=] you can select the function or plot that are on to off using the [F4 check mark or deselect] key or [F5 All] key and  key will turn off all functions and plots until the next command to turn them back on again. Because you mentioned this graph just won't go away leads me to believe its plots that may be on but, you said you can add functions which kind of confused me because the plot is the same place as the y=function just above them. It is real easy to not even know the plot function is there much less even know if one is on. There is other possibilities but, my solution may or may not help you from having to clear drawing every the time. Then again if it is because of internal programs running the clear drawing is your better choice unless you know what now internally may be operating to causing your problem. Any programs you've been operating lately? Make sure you clear out your variables and equations before you leave the Numeric Solver APP, I've went through a lot of problems before I learned that.
Hope this helps you with your calculator!
Posted on Sep 14, 2009
There is an instruction to clear graph
When in Graph mode Press [F6:Draw] and [1:ClrDraw].
Hope it helps.
Posted on Sep 12, 2009
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