Exercise 1 Page 2

If the population was 280 million in 2000 and 310 million in 2010, then the population grew by 30 million people in 10 years time. 310-280&=30 million people 2010-2000&=10 years We want to know the annual rate of change. This means that we need to know the average number of people added per year. We can use division to find this. 30÷10=3 million people per year On average, 3 million people were added per year to the population of the United States.