Graphs - Graphs of Input Data - Scatterplot by - Polynomial Fit, 95% Conf

Ribbon bar. Select the Graphs tab. In the More group, click Input Data Graphs and from the Scatterplot by submenu, select Polynomial Fit, 95% Confidence...

Classic menus. From the Graphs - Graphs of Input Data - Scatterplot by submenu, select Polynomial Fit, 95% Confidence...

...to create a scatterplot of the selected variable with another variable (specified in the Select Variable dialog box). When this command is selected, the data are fitted with a polynomial fit (by default, of the 2nd degree) and a 95% confidence interval is shown for that line.