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In mathematics, extrapolation is the process of estimating a value beyond a known range of data points. It involves using existing data to predict future trends or values. For example, scientists might extrapolate the rate of carbon-dioxide buildup to predict future atmospheric conditions.12

This differs from interpolation, which estimates values within a known range of data. Extrapolation is used to form conclusions or opinions based on reasoning and available information, such as predicting the course of an economic recession by examining past ones.314

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