I know this might be hard but I'm struggling hope you can help..!

4. -35. -1/26. 1/27. 48. 09. undefined

Step-by-step explanation:

Use of slope formula:

m = (y2 - y1)/(x2 - x1)

4.

m = (7 - 4)/(1 - 2) = 3/-1 = -3

5.

m = (-2 - 0)/(3 - (-1)) = -2/4 = -1/2

6.

m = (5 - 3)/(5 - 1) = 2/4 = 1/2

7.

m = (3 - 0)/(3.5 - 4.25) = 3/0.75 = 4

8.

m = (3/4 - 3/4)/(5 - 2) = 0

9.

m = (2 - 3)/(7.5 - 7.5) = -1/0 = undefined