The displayed values for *r* (the correlation coefficient) and/or *r*^{2}
(the coefficient of determination) may be switched on or off by using the
DiagnosticOn or the DiagnosticOff instruction.

If the values for *r* and/or *r*^{2} do not need to be displayed, from the home screen
press
and scroll down to the option DiagnosticOff. Press .
The word ** Done** should appear on the home screen.

Upon finding the values for a regression model, the values for *r* and *r*^{2}
are not displayed. The displayed values for a linear regression model are
shown below.

If the values for *r* and/or *r*^{2} are needed, choose DiagnosticOn from the catalog.
Be sure to press once the DiagnosticOn instruction is placed on the home screen.
The word ** Done** should appear.

Upon finding the values for a regression model, the values of *r* and *r*^{2}
are now displayed. The displayed values for the same linear regression model are
shown below.