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Which simple formula can be remembered while understanding population growth?

Answer and explanation

Correct answer: Births minus deaths, then add net migration

Direct answer: A. A useful accounting formula is: total population change = (births − deaths) + net migration. First calculate natural increase by subtracting deaths from births. Then add net migration, where net migration means immigrants minus emigrants. For example, if births are 1,000, deaths are 600, and net migration is −100, total change is (1,000 − 600) + (−100) = 300. A is correct because it includes both natural change and movement of people. B combines unrelated physical measurements. C combines a population measure with a soil feature and has no population-growth meaning. D is also not a demographic formula. Be careful: a negative net-migration value must be added with its sign, which effectively subtracts people. Memory cue: natural change first, migration second.

Related tags

Growth FormulaBirthsDeathsNet MigrationPopulation GrowthPopulationGeographyClass 9 Mcq

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