Final answer:
To determine the annual rate of population change for a city with a decrease of 9,126 people over 30 years, divide the total decrease by the years. The result is a decrease of 304.2 people per year. This contrasts with demographic transitions where a country's population may grow due to a higher birth rate than death rate.
Step-by-step explanation:
The student's question appears to involve calculating the average change in population per year based on a total population decrease over a span of 30 years. Although the student's original question is somewhat unclear, it can be interpreted as a mathematical problem involving rate of change. To respond to a refined version of the question:
If a city's population decreases by 9,126 people over 30 years, the average annual rate of population change can be calculated by dividing the total population decrease by the number of years.
Change in population per year = Total population decrease / Number of years = 9,126 people / 30 years = 304.2 people per year
This indicates that the city's population is decreasing by an average of 304.2 people each year.
To relate this to the provided reference information:
A country in the early stages of demographic transition may experience a birth rate of 35 per 1,000 per year and a death rate of 15 per 1,000 per year. This yields a net addition of 20 people per 1,000 per year (birth rate - death rate = 35 - 15 = 20), or a 2% growth rate. In terms of population size, this positive growth contrasts with the city in the student's question where the population is decreasing, which would be an example of demographic change resulting in population decline.