Which graph represents a linear function?

In which form is the following function written? y = - 2(x – 3)(x + 5)

When solving this problem: 3025/5.5 = a/90.75 you get 49912.5 which would be the length of one of the sides of a square when the area is only 90.75 inches. is that answer correct, why, and how is it possible?

Petes dog weighed 30 pounds it then lost 16% of it's weight how much did pete lose