Linear Regression

1. To find the correlation coefficient r:

            First, your calculator must be set up to display the correlation.  (You only have to set it up once, so if you’ve                done it in class, skip this part.  Sometimes if you change batteries you have to do it again.) 

            1. Hit 2nd CATALOG (this is over the 0 button). 

            2. Go down to DiagnosticOn, hit ENTER then ENTER again. 

             It is now set up to display correlation with the regression line.

2. To graph a scatter plot using your graphing calculator.
                       1. STAT PLOT
                    2. Choose Plot 1 ENTER
                    3. Turn Plot ON
4. Choose the scatter plot
                    5. Make sure the variables are L1 and L2

Linear Regression Worksheet