Texas Instruments TI-84 - Manual (Page 306)

Chapter 12: Statistics 303
The TI-84 Plus uses the formula below to compute RESID list elements. The next
section describes the variable
RegEQ .
RESID = Ylistname
N
RegEQ(Xlistname)
Automatic Regression Equation Automatic Regression Equation Automatic Regression Equation 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-84 Plus variable RegEQ , which is item 1 on the VARS Statistics
EQ secondary menu.