x = 5, y = 4.5(5) + 20 = 42.5 (5, 42.5)
so (5,40) is not a solution
x = 7, y = 4.5(7) + 20 = 42.5 (7, 51.5)
so (7,52) is not a solution
x = 10, y = 4.5(10) + 20 = 65 (10, 65)
so (10,25) is not a solution
x = 12, y = 4.5(12) + 20 = 74 (12, 74)
so (12, 74) is a solution
answer
D (12, 74)
