Texas Instruments TI-83 Plus Manual page 60

Fitting a Graph to a Regression
After you graph a scatter plot or an xy line, you can fit that graph
to a regression to see how the data fits into a curve.
Note
Regressions are stored to Y
it will not be restored when you exit the Science Tools
application.
1. Display the graph of a
2. Press \  to exit the graph and display the
FIT METHOD
3. Select a fit method.
Fit Method
LIN REG
TI-83 Plus Science Tools Application
1
scatter plot
screen.
Description
Displays a linear regression
that fits the model y=ax+b to
the data using a least-
squares fit.
. If you have a function stored in Y
or xy line.
,
1
CHOOSE A
Graph
Page 60