We’re beta testing our new graph-making tool, and we’d love your feedback! If you notice anything confusing, buggy, or awesome, please tell us here: Open Google Form for Feedback in a New Tab
Scatter Plot Maker
How is the best-fit line found?
This tool uses a standard method called least-squares linear regression. It finds the straight line that makes the total “vertical distance” from the points to the line as small as possible.
In other words, it chooses a slope and intercept so the line is the closest overall match to your data. This is the same basic method used in Excel, Desmos, and graphing calculators when you add a linear trend line.
Note: This tool shows the line and R² only (not confidence intervals or p-values). That keeps it simple for classroom use.
Insert Data Points
| X value | Y value | Actions |
|---|