You have been given suggestions and references to help you understand the concept and hence, be able to solve your problem. It sounds like you really don't want to learn, but just want the mechanics of how to do it. That won't help you in the long run. But if you insist...
\(\displaystyle m=\frac{y_2-y_1}{x_2-x_1}\) where m is the slope, one point on the line is (x[sub:3d6sridr]1[/sub:3d6sridr],y[sub:3d6sridr]1[/sub:3d6sridr]) and another point on the line is (x[sub:3d6sridr]2[/sub:3d6sridr],y[sub:3d6sridr]2[/sub:3d6sridr]). Now, you can plug and chug without understanding.