I need help with two questions, and if you could explain how you came to the answer, i would be grateful.

1. Which of the following points do not lie on the line:

2y + 5x - 4 = 0

a. ( -0.8 , 0 )

b. ( -1 , 0.5 )

c. ( 0 , 2 )

d. ( 2 , 3)

2. P is the point ( 3 , 5 ). Q is the point ( -1 , 9 ). R is the midpoint of PQ.

Which of the following does R lie on?

a. y = x + 6

b. y = x + 8

c. y = x - 6

d. y = x - 8

Thanks in advanced to anyone who can help.