Use the Regression tab to run simple linear regressions.

Under Settings, select the Explanatory Variable and
Response Variable.
Numerical explanatory variable: A scatter plot is displayed with both a
regression line and confidence bands.
Categorical explanatory variable: A box plot displays the relationship
between the variables.
For both types, two tables are displayed below the plot:
 Model’s Summary Table
 Shows the output for the regression analysis.
 Coefficient Summary Table
 Shows hypothesis test results for each parameter in the regression model.
 Optional:
Adjust the Confidence Interval slider.
The confidence interval value, α, and confidence bands are updated.
 Optional:
Clear Regression Line or Confidence Bands to hide
those from the scatter plot.
 Optional:
Click Scatter Plot of Residuals to see a scatter plot of residuals versus
the xvalues.