Create a scatter graph online
Enter your data sets in the calculator below. Click the 'Calculate' followed by 'Create Scatter Graph' buttons and your scatter graph will open in a new window. A menu appears above the scatter graph offering several options, including downloading an image and adding a trend line.
To add a trend line or line of best fit, select the 'Edit in Chart Studo' option from the menu above the scatter graph. In Chart Studo, first open Analysis from the left side menu, then select 'Curve fitting' from the blue Analysis select box at the top.