How to use this calculator

Estimate slope, intercept, correlation, and R² for paired numeric observations.

The method

m = Σ[(x−x̄)(y−ȳ)] / Σ(x−x̄)²

Enter your values in the labeled fields and choose Calculate. The result panel shows the answer and supporting values when useful.

WORKED EXAMPLE INPUT

X values: 1, 2, 3, 4, 5, Y values: 2, 4, 5, 8, 10

Select Calculate to evaluate these example values.

Scope and limitations

Requires at least two pairs and nonzero variation in x.

Common questions

Can I change the example values?

Yes. Replace every prefilled value with your own inputs and calculate again.

Are displayed results exact?

Some results are rounded for readability. Keep extra precision when the next step depends on the result.

Methods & verification

Formulas use standard mathematical definitions and fixed unit factors where applicable. See our methodology for numerical conventions, rounding, privacy, and limitations.