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Why can absolute increase differ in two areas even when they have the same growth rate?

Answer and explanation

Correct answer: Because their base populations may be different

Direct answer: A is correct. A growth rate is usually expressed as a percentage of the starting, or base, population. The same percentage therefore produces different numbers when the bases differ. For example, 10% growth in an area with 1,000 people adds 100 people, while 10% growth in an area with 10,000 people adds 1,000 people. Both rates are equal, but the absolute increases are different. B is wrong because growth rate measures change relative to population, not area. C is wrong because equal birth rates are not guaranteed and do not explain the mathematical point. D is wrong because migration can affect actual population change. Memory cue: percentage needs a base; always ask “10% of how many?”

Related tags

Base PopulationGrowth RateAbsolute IncreasePopulation GrowthPopulationGeographyClass 9 Mcq

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