Algebra

Slope

Rate of vertical change per unit horizontal change.

m = (y₂ − y₁)/(x₂ − x₁)

Variables

m
slope
(x₁,y₁),(x₂,y₂)
two points

Example

(1,2),(3,6) → m=2

How to use this formula

Identify the known values, keep units consistent, substitute the values into the formula, and calculate carefully. Then check whether the result is reasonable for the original problem.