Do I need to install anything?

No. It runs in any modern browser, free, with no account required.

For First Responders · Linear Regression

Linear Regression for a customer churn

Built for first responders planning or training for real incidents. Run fast what-if scenarios for response planning and training — no software to install in the field. Simulate a customer churn live below — adjust the inputs and watch it respond, right in your browser.

Linear RegressionLive

least squares & R²

Controls

Presets

True slope

Noise level

Data points

Ordinary least squares finds the line that minimizes the sum of squared vertical residuals (the gray drop-lines). R² measures the fraction of variance the line explains — 1 is perfect, 0 is useless. Add noise or remove points to watch the fit and R² degrade.

▶ Run in Python

Data Inspector

Fitted slope0.000

Intercept0.000

R²0.000

Correlation r0.000

Governing equation

\overset{y}{^} = 0.00 + 0.00 x, β_{1} = \frac{\sum ( x - x ˉ ) ( y - y ˉ )}{\sum ( x - x ˉ ) ^{2}}, R^{2} = 0.00

Reading this result: R² = 0.00: noise (2) swamps the signal, so least squares can barely tell the slope from flat — adding data points would tighten the estimate.

Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.

or unlock everything with Pro →

Also for:Students Researchers Educators Engineers Hobbyists & Makers K-12 Students General version →

More with Linear Regression

Linear Regression for an A/B test Linear Regression for a survey sample Linear Regression for a poll margin Linear Regression for a quality-control chart Linear Regression for a clinical trial Linear Regression for a click-through rate Linear Regression for an exam-score curve Linear Regression for a defect rate

Frequently asked questions

Is this good for first responders?: Yes — this version of "Linear Regression for a customer churn" is framed for first responders planning or training for real incidents. Run fast what-if scenarios for response planning and training — no software to install in the field.
Do I need to install anything?: No. It runs in any modern browser, free, with no account required.