Free interactive student tool
Free Linear Regression Calculator
Free Linear Regression Calculator. Equation, coefficients, R-squared, residual checks and a worked interpretation.
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ŷ = intercept + slope × x
How this tool reaches its result
Ordinary least squares chooses the line that minimizes squared residuals.
ŷ = intercept + slope × x
Worked context
How to interpret the output
A slope of 2.4 means the predicted outcome increases 2.4 units for each one-unit increase in x.
Important limitation
What the result cannot decide for you
Linearity, residual independence, constant variance and influential cases still require evaluation.