You can also find slope by using rise/run: 1). Pick 2 points on a graph. 2). The goal is to connect those two points. 3). Count a certain amount of units up and across to get to your second point. 4). If your second point is negative, you have to count a certain amount of units down and across to reach your second point.
If my words don't make any sense, check out www.algebra-class.com. There is a full explanation of this.
