Slopes of horizontal and vertical lines

Find the change in y and the change in x. A horizontal line has slope 0. A vertical line has no slope: write none.

1. Find the slope of the line through (−3, −3) and (5, −3).
2. Find the slope of the line through (−4, 0) and (−4, 36). Write none if the line has no slope.
3. Find the slope of the line through (2, 5) and (2, −25). Write none if the line has no slope.
4. Find the slope of the line through (−5, 7) and (−5, 9). Write none if the line has no slope.
5. Find the slope of the line through (1, −8) and (9, −8).
6. Find the slope of the line through (−1, −2) and (−1, 4). Write none if the line has no slope.
7. Find the slope of the line through (−5, −6) and (−5, 36). Write none if the line has no slope.
8. Find the slope of the line through (−2, 9) and (5, 9).
9. Find the slope of the line through (−5, −6) and (2, −6).
10. Find the slope of the line through (11, −11) and (11, −71). Write none if the line has no slope.
11. Find the slope of the line through (−2, −8) and (−2, −22). Write none if the line has no slope.
12. Find the slope of the line through (1, 9) and (1, 51). Write none if the line has no slope.
13. Find the slope of the line through (6, −4) and (6, 20). Write none if the line has no slope.
14. Find the slope of the line through (14, −14) and (23, −14).
15. Find the slope of the line through (−9, −4) and (−4, −4).
16. Find the slope of the line through (−5, 9) and (2, 9).
17. Find the slope of the line through (8, −1) and (8, −17). Write none if the line has no slope.
18. Find the slope of the line through (4, −10) and (4, 4). Write none if the line has no slope.
19. Find the slope of the line through (−19, 7) and (−19, −31). Write none if the line has no slope.
20. Find the slope of the line through (8, 18) and (8, 62). Write none if the line has no slope.