Question

What’s the difference in the y-values of two point on a line called

Answer 1

The rise is the vertical distance between the two points, which is the difference between their y-coordinates. That makes the rise y2 − y1. The run between these two points is the difference in the x-coordinates, or x2 − x1. Since slope equals rise over run, the slope of the line is y2 − y1 over x2 − x1.