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Regression for the TI-89, TI-92, and Voyage 200

You can enter this program yourself or download it for use with TI Connect.

Note: for  -> use the  Store key.

Syntax:  regress( {list of x coordinates separated by commas}, {list of y coordinates separated by commas} )

Program

regress(t,u)
Prgm

ClrIO

t->L1
u->L2
ClrDraw
PlotsOff
FnOff
NewPlot   1,1,L1,L2
ZoomData
Pause

Dialog
    Title "CHOOSE REGRESSION TYPE"
    DropDown "Fit a",{"line","quad","cubic","quart","power","exp","ln","sin"},w
EndDlog

If w=1 Then
    LinReg L1,L2
EndIf
If w=2 Then
    QuadReg L1,L2
EndIf
If w=3 Then
    CubicReg L1,L2
EndIf
If w=4 Then
    QuartReg L1,L2
EndIf
If w=5 Then
    PowerReg L1,L2
EndIf
If w=6 Then
    ExpReg L1,L2
EndIf
If w=7 Then
    LnReg L1,L2
EndIf
If w=8 Then
    SinReg L1,L2
EndIf

ShowStat
regeq(x)->y1(x)
DispG

EndPrgm

Page last modified September 23, 2011