Find the slope of the line that passes through each pair of points
7. ( 1,2),(4,3)
9. ( 0,2), (4,6)
11. ( 2,4),(6,7)
13. (-3, -2),(4,-2)
15.(5,2),(8,-4)
19. (0,0),(3,7)
21.(-3,6),(1,-2)
23. (2,-10),(5,-6)
25. (3,7),(3,5)
27. (-5,-2),(-5,3)