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The numbers of polio cases in the world are shown in the table for various years. Year Number of Polio Cases (thousands) 1988 350 1992

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The numbers of polio cases in the world are shown in the table for various years. Year Number of Polio Cases (thousands) 1988 350 1992 138 1996 31 2000 6 2005 3.2 2007 1.3 Exponential Regression Calculator Let t) be the number of polio cases in thousands t years since 1980. Use a graphing calculator to draw a scattergram of the data. Is it better to model the data by using a linear or exponential model? Find an equation of f. Hint t) 2 ' ' Round the coefficients to 4 decimal places. The number of polio cases is | Select an answer VI by i Select an answer VI per year. Predict the number of polio cases in 2014. Predict in which year there will be 1 case of polio. Hint :] Find the approximate half-life of the number of polio cases. Hint

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