Do the points (1, 5), (2.5, 9.5), and (4.5, 15.5) lie on the same line? How do you know? Prove your answer. That is the question theres no pic

The clayton family’s pool has vertices at the coordinates (0, 2), (0, 5), (2, 5), (2, 6), (5, 6), (5, 1), (2, 1), and (2, 2). if each grid square has an area of 9 square feet, what is the area of the pool?