If x = y and y = z, then x = z

(98 points) i need with 5 questions. answer definitions are welcomed, but not necessary.

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?

Find the domain and range of the following function f(x) = 51x - 21+ 4