This table shows a city's population each year from 2014 to 2020.
Year Population
2014 25,310
2015 25,270
2016 25,160
2017 25,050
2018 24,820
2019 24,640
2020 24,390
Complete the sentence to describe the average rate of change shown in the table.
The city's population
by about
people per year from 2014 to 2020.
decreased
70
To calculate the average rate of change in the city's population from 2014 to 2020, you need to find the difference between the starting population (2014) and the ending population (2020) and divide it by the number of years in between.
Starting population (2014): 25,310
Ending population (2020): 24,390
Number of years: 2020 - 2014 + 1 = 7 (including both the start and end years)
Change in population: 24,390 - 25,310 = -920 (population decrease)
Average rate of change: -920 / 7 ā -131.43 (rounded to two decimal places)
Now you can complete the sentence:
The city's population decreased by about 131.43 people per year from 2014 to 2020.