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Which formula for population growth rate is correct?

Answer and explanation

Correct answer: Growth rate = (New population − Old population) ÷ Old population × 100

The direct answer is A. Population growth rate measures the percentage change in population in relation to the original population. First subtract the old population from the new population to find the increase. Then divide that increase by the old population, because the old population is the reference or base. Finally multiply by 100 to express the result as a percentage. Thus, the formula is: (new population − old population) ÷ old population × 100. Option B is a density-related arrangement, not a growth-rate formula. Option C combines weather elements and does not measure population change. Option D uses unrelated factors. A useful warning is that dividing by the new population gives a different and generally incorrect percentage for ordinary population growth questions.

Related tags

Population Growth FormulaPercentage ChangePopulation GrowthPopulationGeographyClass 9 Mcq

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