Question

What is the slope of the line that passes through (10,1) and (5,2)?

Answer 1

1/5
Using the formula
Y2 - Y1
----------
X2 - X1

Answer 2

slope = m = (difference in y)/(difference in x)

Subtract the y-coordinates: 2 - 1 = 1
Subtract the x-coordinates in the same order:5 - 10 = -5

slope = m = (difference in y)/(difference in x) = 1/(-5) = -1/5