(This will only make sense if u read slow and go with me) Ok so the way I was taught is u use rise over run in a fraction so it would be rise on top and rise on the bottom. Write that on the side of ur paper. Then u fill in the numbers. U go from the point closest on the left and u see how many squares u go up to get to the same hight as the second point. In this case u had to rise 3, then u go from that point and see how many squares u run to the right. In this case 6, so now if u filled in ur fraction right ur fraction that u wrote next to rise/run should be 3 over 6. Then u simplify and u get 1/2. Now ur done. But here's a trick, when u are doing the rise, but u realized that the second point is below the first, u do the same thing but for the rise think of it as sink. So it would be sink over run and when u put it into ur fraction it would be the same but just a negative. I hope this isn't too confusing, if u have any questions just ask me! <3