Find the slope of the line through each pair of points. Show your work on separate paper.
1. (0, 1) and (3, 0)
2. (-3,-2) and (1,6)
3. (4, -1) and (-2,-3)
4. (3,-5) and (1, 2)
5. (-3, -3) and (-1, -3)
6. (2, -8) and (2, 4)