Question

Find the slope of the line that passes through (9, 9) and (4, 1).

Answer 1

The formula of a slope:

`m=(y_2-y_1)/(x_2-x_1)`

We have the points (9, 9) and (4, 1). Substitute:

`m=(1-9)/(4-9)=(-8)/(-5)=(8)/(5)`