How to use this calculator

Two distinct nonvertical points determine one line in slope-intercept form.

The method

m=(y₂−y₁)/(x₂−x₁), b=y₁−mx₁

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

WORKED EXAMPLE INPUT

x₁: 1, y₁: 4, x₂: 3, y₂: 10

Select Calculate to evaluate these example values.

Scope and limitations

Vertical lines cannot be written as y = mx + b.

Common questions

Can I use different units?

Use consistent units unless this page is a unit converter. The result follows the units implied by the inputs.

Are results exact?

Displayed values may be rounded. Keep extra precision for important follow-up calculations.

Methods & verification

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