TI-83 Plus Statistics 353
Automatic Regression Equation
Each regression model has an optional argument, regequ, for which you
can specify a Y= variable such as Y1. Upon execution, the regression
equation is stored automatically to the specified Y= variable and the Y=
function is selected.
Regardless of whether you specify a Y= variable for regequ, the
regression equation always is stored to the TI-83 Plus variable RegEQ,
which is item 1 on the VARS Statistics EQ secondary menu.
Note: For the regression equation, you can use the fixed-decimal mode setting
to control the number of digits stored after the decimal point (Chapter 1).
However, limiting the number of digits to a small number could affect the
accuracy of the fit.