S Ri R 100 Where S is the percent slope Ri is the rise. Slope y 2 y 1 x 2 x 1 text Slope. Slope y₂ - y₁ x₂ - x₁ Notice that the slope of a line is easily calculated by hand using small whole number coordinates.
That line goes down as you move along so it has a negative Gradient.
The slope will be the same for a straight line no matter which two points you pick as you know. A vertical line has an undefined slope since it would result. Use the given slope for m the coefficient of x. The following formula is used to calculate the percentage of a slope of a line with respect to rise over run.