About this tool: Linear Regression Calculator
Fit a least-squares line to x;y pairs, calculate R² and predict y for a chosen x.
Enter one x;y observation per line, using a semicolon or whitespace between values. Least squares minimizes squared vertical residuals. R² describes the fit within your supplied data and does not prove causation; extrapolation outside the observed range can be unreliable.
How the calculation works
Worked example
| Pairs: x; y, one per line | 1;2 2;4 3;6 |
| Predict for x | 4 |
m = 2; b = 0; R² = 1; y(4) = 8
Questions and answers
What does this tool do?
Fit a least-squares line to x;y pairs, calculate R² and predict y for a chosen x. Enter one x;y observation per line, using a semicolon or whitespace between values. Least squares minimizes squared vertical residuals. R² describes the fit within your supplied data and does not prove causation; extrapolation outside the observed range can be unreliable.
What affects precision and input format?
Floating-point results are rounded for display. Keep the units shown in the input labels; decimal points and decimal commas are accepted.
Where are the calculations performed?
The calculation runs in your browser. You can use the tool without installing software.
Asted Cloud
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