An advertising agency has found that when it promotes a new product in a city of 350 000 people the Fate of of people x who are aware of it and is given by R 31 500 0 09x where x 20 and R 2 0 R 30 000 25 000 20 000 15000 10000 5000 R 60 000 50 000 40000 30000 20000 10000 a Use the intercepts to determine a window and then graph the equation for x 0 R 100000 200000 300000 400000 100000 200000 300000 400000 60 000 50 000 40 000 30 000 20 000 10000 100000 200000 300000 100000 R 30 000 25 000 20 000 15000 10000 5000 b is the rate of change increasing or decreasing Explain why your answer makes sense in the context of the problem The rate of change is decreasing because as the number of people aware of the product increases the rate of change goes down The rate of change is increasing because as the number of people aware of the product increases the rate of change goes down 100000 200000 300000 400000