Tune a straight line through a cloud of points and chase the lowest possible error.
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How to play
You are given a scatter of data points and a line described by y = m·x + b. Adjust the slope m and intercept b until the line fits the points as the mode demands. Residual segments show how far each point sits from your line, so you can see your error shrink.
Exact: thread the line through every point so the total error reaches zero.
Best Fit: get your error down to the least-squares par.
Drift: the points drift around for 30 seconds and you keep adjusting to hold a good fit, scoring on coverage.
Five difficulty levels change spread and point count; a Show Best button snaps to the ideal line to learn from.
Controls
Desktop: drag the slope and intercept sliders, or drag the line itself, the middle shifts the intercept, the ends tilt the slope.
Phone & tablet: drag the sliders or the line with your finger; tap the mode, source and difficulty buttons.
Game modes
Daily seeded data or endless Practice, each across Exact, Best Fit and Drift challenges.
Tips & strategy
Set the intercept first to centre the line vertically, then tilt the slope to balance points above and below.
In Best Fit you only need to reach par, not perfection, stop fiddling once the error meets the target.
In Drift, anticipate where the cloud is heading rather than chasing its current position.
What you'll learn
Line of Fit makes linear regression and least-squares fitting tactile, letting you feel how a line balances the scatter of data.
Skills: linear regression, line of best fit, scatter plots, slope and intercept
Best for: roughly high school (ages 14+)
For parents & teachers: an intuitive bridge into statistics before the formulas.
About Line of Fit
Line of Fit is an original free browser game from PlayPendium that makes linear regression and least-squares fitting tactile and visual. Play instantly, no install required.
A free, original browser game on PlayPendium. No download, no install.
