Life Expectancya. Find a linear function y = f (x) that models the data shown in the figur...

Life Expectancy

a. Find a linear function y = f (x) that models the data shown in the figure that follows, with x equal to the number of years after 1950 and y equal to the number of years the average 65-year-old woman is estimated to live beyond age 65.

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b. Graph the data and the model on the same set of axes.

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c. Use the model to estimate f (99) and explain what it means.

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d. Determine the time period (in years) for which the average 65-year-old woman can expect to live more than 84 years.