User Manual

20101001
Regression Graph Operations (Curve Fitting)
After plotting a scatter graph of paired-variable spreadsheet data (Single-variable and
Paired-variable Statistical Calculations, page 13-6-1), you can draw a regression graph that
approximates the scatter graph and determine the regression formula.
S
To plot a scatter graph and then draw its regression graphTo plot a scatter graph and then draw its regression graph
(1) Enter the paired-variable data into the spreadsheet, and then select the range of cells
where it is located.
(2) Tap [Graph] and then [Scatter].
• This plots the scatter graph for the data you selected in step 1.This plots the scatter graph for the data you selected in step 1.
(3) On the menu bar, tap [Calc] and then use the menu that appears to select the desired
regression type (Linear Reg, MedMed Line, Quadratic Reg, Cubic Reg, Quartic Reg,
Quintic Reg, Logarithmic Reg, Exponential Reg, abExponential Reg, Power Reg,
Sinusoidal Reg, Logistic Reg).
• This superimposes the regression graph on the scatter graph. Also, the regressionThis superimposes the regression graph on the scatter graph. Also, the regression
calculation result window will appear in the half of the display.
Tip
For details about how to use the Link check box and [Output>>] button on the regression
calculation result window, see “Regression Calculations” (page 13-6-2).
Note that the regression calculation result window is not available for Quintic Reg.
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13-9-15
Graphing