Find the slope of the line through each pair of points.
1. (6, −18) and (15, −18)
2. (8, 12) and (0, 16)
3. (−15, 37) and (−15, 2)
4. (1 ,20) and (−5, 30)
5. (4, −36) and (8, −12
6. (11, −23) and (7, −15)
7. (−72, 54) and (−38, 100)
I will give Brainliest and 100 points