Problema Solution
On a certain stretch of road, the point 420 feet east of point A is 24 feet lower than point A. Point B 600 feet east of A is 36 feet lower that point A.
Find the grade of road surface between point A and B.
Answer provided by our tutors
m = (y2 - y1) / (x2 - x1)
m = (-36 - 0) / (600 - 0)
m = -36/600
m = -3/50