We have, y = 2x + 3 (i)

a. (2, 8) [putting x = 2 and y = 8 in (i)]

8 = 2(2) + 3

8 ≠ 7

Thus, A doesn’t lie on the line.

b. (3, 9) [putting x = 3 and y = 9 in (i)]

9 = 2(3) + 3

9 = 9

Thus, B lies on the line.

∴ Option B is correct.