4. the lunchbox is one of many options for workers in lanford, illinois to get a quick and tasty meal at reasonable prices. the manager of the restaurant wanted to raise prices but did not know if the quantity demanded would fall off too much. he decided to raise prices and wait and see before making the increases permanent. in the first week after he raised prices on the menu an average of 10%, the restaurant served fewer lunches but revenue did not fall. based on this, he decided to keep the new menu. would you expect revenue to continue at this level?