In Example 1 on page 910, we used two data points and an

Chapter 12, Problem 12.1.571

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In Example 1 on page 910, we used two data points and an exponential function to model the population of the United States from 1970 through 2009. The data are shown again in the table. Use all five data points to solve Exercises 4549. a. Use your graphing utilitys exponential regression option to obtain a model of the form y abx that fits the data. How well does the correlation coefficient, r, indicate that the model fits the data? b. Rewrite the model in terms of base e. By what percentage is the population of the United States increasing each year?

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