In the phrase "rise over run," what does "run" indicate?

Question

AThe difference in y coordinates between two points on a line.incorrect answer
BThe difference in x coordinates between two points on a line.incorrect answer
CThe difference between the x intercept of a line and the y intercept of a line.incorrect answer
DThe difference between a line's slope and its length.

Answer 1

BThe difference in x coordinates between two points on a line.