ALGEBRA / CALCULATOR
Slope Calculator.
Find the slope and line through two points.
LET’S WORK IT OUT
Your numbers, your answer.
THE WHY BEHIND THE ANSWER
How it works.
Slope measures vertical change per unit of horizontal change. Once you have the slope, substitute either point to find the y-intercept.
THE FORMULASlope m = (y₂ − y₁) ÷ (x₂ − x₁)
Worked example
Points (1, 2) and (4, 8) have slope 6 ÷ 3 = 2 and equation y = 2x.
Good to know
A vertical line has an undefined slope and is written as x = a constant.
ONE MORE THING
What happens if both points are the same?
One point alone does not determine a unique line, so enter two distinct points.