Amanufacturing company has developed a cost model, c(x)= 0.15x^3 + 0.01x^2 +2x +120, where x is the number of item sold thousand. the sales price can be modeled by s(x) + 30- 0.01x. therefore revenues are modeled by r(x)= x*s(x). the company's profit, p(x) = r(x)-c(x) could be modeled by 1. 0.15x^3+ 0.02x^2- 28x+120 2. -0.15x^3-0.02x^2+28x-120 3. -0.15x^3+0.01x^2-2.01x-120 4. -0.15x^3+32x+120

Three students, javier, sam, and corrine, participated in a fundraiser where people donated a certain amount of money per lap that the student ran. each student also had some initial donations that were collected before the run. the equations that represent each student's total donation, y, based on the number of laps ran, x, is shown below. match each equation with the correct rate of change for that student.