Use the (y₂-y₁)/(x₂-x₁)
Note: (x₁,y₁) & (x₂,y₂)
Choose two points, and make sure that each one you choose fits in the corresponding part of the expression.
(x₁, y₁) = (-2,0)
(x₂, y₂) = (0, -2)
Remember:
(y₂ - y₁)/(x₂ - x₁)
Plug in corresponding numbers
(-2 - 0)/(0 - (-2))
-2/ 0 + 2 (2 negatives = 1 positive)
-2/2 = -1
-1 is your slope (for every run 1, rise - 1)
hope this helps
