Point 1 = (6, 8)
Point 2 = (1, 7)
slope = (y2 - y1) / (x2 - x1)
x1 = 6 y1 = 8 x2 = 1 y2 = 7
Substitution
slope = ( 7 - 8) / ( 1 - 6)
Simplification
slope = -1/-5
Result
slope = 1/5
