Texas Instruments TI-83 Manual Book page 204

Since the scatter plot of time-versus-length data appears to be approximately
linear, fit a line to the data.
10. Press ... ~
(linear regression model) from the
menu.
CALC LinReg(ax+b)
the home screen.
11. Press y [
L1
~
to display the
1
secondary menu, and then
FUNCTION
press to select
1
pasted to the home screen as arguments
to
LinReg(ax+b)
12. Press Í to execute
linear regression for the data in
is calculated. Values for
displayed on the home screen. The linear
regression equation is stored in
Residuals are calculated and stored
automatically in the list name
which becomes an item on the
menu.
NAMES
13. Press s. The regression line and the
scatter plot are displayed.
12-4 Statistics
to select
4 4:LinReg(ax+b)
is pasted to
] ¢ y [ ] ¢. Press 
L2
VARS Y.VARS
. , , and
1:Y L L
1 1 2
.
LinReg(ax+b)
and
a b
RESID
STAT
are
Y
1
. The
and
L L
1 2
are
.
Y
1
,
LIST