On a water ride at the amusement park, a rotating valve sprays water for 15 ft in all directions. what its the area of the circular wet patch it creates?

The area is 3.14*r^2 

The rotating valve would be in the center of the circular wet patch so if it's spraying in all directions, then 15 ft = radius. 

Now plug it in. 

3.14 x (15)^2 = 706.5 ft^2

There is no graph but what i can say is that 1 is the slope and that -2 is the y- intercept