What is the slope of the line whose function f satisfies f(−2)=1  and  f(5)=−10f(−2)=1  and   f(5)=−10?

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?