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Question: World population With data from the International Data Base of the U.S. Bureau of the Census, the accompanying figure shows a scatter plot of actual or projected world population (in billions) in 5-year increments from 1950 to 2050 (x = 0 in 1945). Which of the following functions would be the best model: exponential growth, exponential decay, logarithmic, or logistic? Explain.

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