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Regression Calculator

Free regression calculator to calculate linear regression line. Instant results in your browser — no signup.

Also known as: Calculate linear regression line, linear regression calculator, least squares line, regression calculator, trend line, calculate linear regression line calculator, calculate linear regression line, statistics math

Direct calculator

Inputs

Results update when you click Solve.

Line ŷ = mx + b

y = 0.9000x + 1.3000

Slope m

0.9000

Intercept b

1.3000

R²

0.8100

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What this result means

Free regression calculator to calculate linear regression line. Instant results in your browser — no signup. Slope m = Σ(x−x̄)(y−ȳ)/Σ(x−x̄)²; intercept b = ȳ − mx̄.

Assumptions

  • Rule dependency: Universal formula.

How is it calculated?

Slope m = Σ(x−x̄)(y−ȳ)/Σ(x−x̄)²; intercept b = ȳ − mx̄.

Example

Fit a best-fit line through scattered (x, y) pairs.

Frequently asked questions

Prediction?+

Plug x into y = mx + b for predicted ŷ.