Texas Instruments TI-84 - Manual (Page 279)

Chapter 12: Statistics 276
Since the scatter plot of time-versus-length data appears to be approximately linear, fit a
line to the data.
10. Press
… ~
4 to select 4:LinReg(ax+b) (linear
regression model) from the STAT CALC menu.
LinReg(ax+b) is pasted to the home screen.
11. Press
y d ¢ y e ¢. Press  ~
1 to
display the VARS Y-VARS FUNCTION secondary
menu, and then press 1 to select 1:Y1 . L1 , L2 , and
Y1 are pasted to the home screen as arguments to
LinReg(ax+b) .
12. Press
Í to execute
LinReg(ax+b) . The linear
regression for the data in L1 and L2 is calculated.
Values for a and b are displayed on the home
screen. The linear regression equation is stored in
Y1 . Residuals are calculated and stored
automatically in the list name RESID , which
becomes an item on the LIST NAMES menu.
13. Press
s. The regression line and the scatter
plot are displayed.