Final answer:
The average rate of change in Country Z's population from 2002 to 2016 is approximately -214,286 people per year when rounded to the nearest whole number.
Step-by-step explanation:
The average rate of change in the population of Country Z from 2002 to 2016 can be calculated by finding the difference in population between these years and dividing by the number of years over which this change occurred. The population decreased by 3 million over 14 years (2016 minus 2002 equals 14). Therefore, the average rate of change per year is the change in population divided by the change in time.
Using the provided figures:
- Population change = 9 million - 12 million = -3 million (a negative sign indicates a decrease).
- Time period = 2016 - 2002 = 14 years.
- Average rate of change = Population change ÷ Time period = -3 million ÷ 14 years = approximately -214,286 people per year.
Rounded to the nearest whole number, the average rate of change is approximately -214,286 people per year.