Chapter 17: Activities 492
:L2p!Xmin
:2p!Xmax
:pà2!Xscl
:L10!Ymin
:10!Ymax
:1!Yscl
Set viewing window.
:DispGraph
:Pause Display graph.
:FnOn 2
:Lbl Z
:Prompt C,D Prompt for guess.
:DispGraph
:Pause Display graph.
: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")
Display results.
:DispGraph
:Pause Display graph.