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Why is looking only at the percentage growth rate insufficient for evaluating population growth in a region?

Answer and explanation

Correct answer: Because the numerical increase also depends on the size of the population base

A percentage growth rate describes relative change, not the actual number of people added. The numerical increase depends on the initial population, called the population base. The calculation is \(\text{increase}=\text{base population}\times\text{growth rate}\). Thus the same rate can produce very different absolute increases in regions of different sizes.

For example, 1 percent of 100,000 is 1,000, whereas 1 percent of 10,000,000 is 100,000. Both regions have the same percentage rate, but the second adds far more people. Therefore, option A is correct. Percentage growth is still useful for comparing relative change, but it should be read together with the base population when planning housing, schools, jobs, health care, and other services. Land area alone does not tell us the number added.

Related tags

Growth Rate Vs Absolute GrowthPopulation BasePlanningDemographic AnalysisPopulation GrowthThe World Population – DistributionDensity And GrowthThe World Population Distribution Density And Growth

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