Explanation:
7. The two coordinates are (0, 4) and (1, -4).
 To find the slope you would need to use the formula 

 
 = (-4),
 = (-4), 
 = 4
 = 4
 
 = 1,
 = 1, 
 = 0
 = 0
 =
 = 
 = -8
 = -8
8. The coordinates, (1, 4) and (0, -2)
(-2) -4 / 0 -1 = -6 / -1 = 6 
Sorry for not formatting 8
9. The coordinates (-1, 3) and (4, -1)
(-1) - 3/ 4 - (-1) = -4/ 5
10. The coordinates (1, -1) and (2, -2)
(-2)- (-1) / 2 -1 = -1 / 1 = -1
 Hope this helps!!!