Can someone help me on this?

In what form is the following linear equation written y=9x+2

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?

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2