Texas TI-86 用户手册

20ATOZ.DOC   TI-86, Chap 20, US English   Bob Fedorisko   Revised: 02/13/01 2:42 PM   Printed: 02/13/01 3:05 PM   Page 331 of 118

20ATOZ.DOC   TI-86, Chap 20, US English   Bob Fedorisko   Revised: 02/13/01 2:42 PM   Printed: 02/13/01 3:05 PM   Page 331 of 118

Uses 

, 

, and 

, and stores the regression

equation to 

 only.

STAT CALC menu

Built-in equation variables
such as y1, r1, and xt1 are
case-sensitive. Do not use
Y1, R1, and XT1.

Performs a third order polynomial regression using real
data pairs in xList and yList and frequencies in
frequencyList

. The regression equation is stored to

, which must be a built-in equation

variable such as 

, 

, and 

. The equation’s

coefficients always are stored as a list to built-in
variable 

.

Values used for xList, yList, and frequencyList are
stored automatically to built-in variables 

, 

,

and 

, respectively. The regression equation is

stored also to built-in equation variable 

.

Uses frequencies of 1.

Stores the regression equation to 

 only.

In 

 graphing mode:

L

L

Uses frequencies of 1, and stores the regression
equation to 

 only.