The graph represents the relationship between the number of rocks a child collects, r, over a number of weeks, w. Which function can be used to determine the number of rocks, r, a child will collect after w weeks?

r=115w+5

r = 5w + 15

r=15w+15

r = 15w + 5

Ms.ortiz sells tomatoes wholesale. the function p(x)=-80x^2+320x-10, graphed below, indicates how much profit she makes on a load of tomatoes if she makes on a load of tomatoes if she sells them for 4-x dollars per kilogram. what should ms.ortiz charge per kilogram of tomatoes to make on a load of tomatoes?