Discussion
Which among the following basic equation expresses the change in population overtime in a simple form ?
Answer: B
The balancing equation expresses the change in population over time in a simple form: the population at the end of a period equals the population at the start plus births minus deaths plus in-migrants minus out-migrants. It is the basic accounting identity of demography, written as P2 = P1 + B - D + I - O.
A quadratic equation, an integral equation and a functional equation are mathematical terms for kinds of equations and are not the name of the demographic identity relating the change in a population to its components.
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