Texas Instruments TI-83 Manual Book page 578

:1!Yscl
:DispGraph
:Pause
:FnOn 2
:Lbl Z
:Prompt C,D
:DispGraph
:Pause
:If C=A
:Text(1,1,"C IS OK")
:If CƒA
:Text(1,1,"C IS WRONG")
:If D=B
:Text(1,50,"D IS OK")
:If DƒB
:Text(1,50,"D IS WRONG")
:DispGraph
:Pause
:If C=A and D=B
:Stop
:Goto Z
TI-83 Plus Activities
Display graph.
Prompt for guess.
Display graph.
Display results.
Display graph.
Quit if guesses are correct.
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