Linear Regression Calculator

Fit a straight line to paired data and calculate slope, intercept and correlation.

InputsChange a value to recalculate instantly

x₁

y₁

x₂

y₂

x₃

y₃

x₄

y₄

ResultUpdates as you type

Pearson r0.98

Slope1.9

Intercept0

R²0.96

How it worksTransparent math

Formulay=a+bx; b=Sxy/Sxx; r=Sxy/√(SxxSyy)

Fits a least-squares straight line to four paired observations and reports Pearson correlation and R².

Result breakdownSee the important numbers together

1Pearson r0.98

2Slope1.9

3Intercept0

4R²0.96

λ DooMathWork with this calculation

Local · deterministic · optional

auto_awesome

Quick mathNatural-language-style shortcuts for deterministic arithmetic.

Calculator guide

How to use the Linear Regression Calculator

Fit a straight line to paired data and calculate slope, intercept and correlation.

01Set inputsChoose values, units and assumptions.

02Apply the modely = a + bx

03Read the resultCheck the output against the assumptions before using it.

menu_book

Fit a straight line to paired data and calculate slope, intercept and correlation.

functions

y = a + bx

fact_check

Review the inputs, units and assumptions before using the result for a real decision.