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Why is base population important while comparing population growth rate?

Answer and explanation

Correct answer: Because the same percentage can add different actual numbers

Direct answer: Option A. A growth rate is calculated in relation to the population at the beginning of the period, called the base population. The formula is percentage growth = (increase ÷ base population) × 100. Therefore, the same percentage can represent very different numbers of people. For example, 10% of 1,000 is 100, but 10% of 100,000 is 10,000. Option A is correct because the base determines the actual number added. Option B is wrong because percentage growth is directly related to the starting population. Option C is wrong because the base is the initial population, not zero. Option D is wrong because growth rate concerns population change, not land area. Do not confuse relative growth, expressed as a percentage, with absolute growth, expressed as the number of people. Memory cue: percentage needs a base.

Related tags

Base PopulationGrowth RateAbsolute GrowthPopulation GrowthPopulationGeographyClass 9 Mcq

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