GCSE Secondary Maths Age 13-17 - Ratio, Proportion & Rates of Change: Percentages - Explained

The video tutorial explains how to estimate the population growth of a city using a constant rate of 5.2% per year. Starting with a population of 1,560,000 in 2015, the tutorial demonstrates calculating the population for 2017 using compound interest. It further predicts when the population will reach 2 million, concluding it will be in 2020. The tutorial also discusses the impact of incorrect growth rate assumptions on predictions. The video concludes with a review of the questions and marks allocation.

How much did the population increase by in 2014?

What was the population of the city at the beginning of 2015?

What is the formula used to calculate the population after two years of growth?

What was the estimated population of the city at the beginning of 2017?

Explain the significance of rounding in the final population estimate.

In which year will the population reach 2,000,000 according to Lynn's assumption?

What effect would a higher rate of population increase have on the time it takes to reach 2,000,000?