Adelivery person uses a service elevator to bring boxes of books up to an office. the delivery person weighs 190 lb and each box of books weighs 50 lb. the maximum capacity of the elevator is 1130 lb. how many boxes of books can the delivery person bring up at one time?

correct choice is b

step-by-step explanation:

when you calculate the average rate of change of a function, you are finding the slope of the secant line between the two points. for the function the average rate of change from point to point can be calculated as

to find the average rate of change from day 2 to day 10, note that at day 2, 8 houses were sold, so a(2,8) and at day 10, 2 houses were sold, so b(10,2). thus,