Answer:
-2
Explanation:
First, pick two points on the line; I am using (0, -1) and (-2, 3). Put it into point-slope form, like this:
. Solve to get
, or -2. This is your slope. Another way to find it is to find one point on the line and count how many points it is up or down from the first point, in this case that number is 4, and how many to the right or left, which in this case is 2 to the left. Moving left is negative, so it becomes -2.