In coordinate geometry, the slope is a measure of how steep a line is. It indicates the rate at which the line rises or falls as you move along it.

The slope of a line passing through two points (x₁, y₁) and (x₂, y₂) can be calculated using the formula:

m = (y₂ - y₁) / (x₂ - x₁)

This formula is known as the "slope formula" or "gradient formula." It calculates the change in the y-coordinates divided by the change in the x-coordinates between the two points.

m = tanθ  =