Biomedical Sciences: Future Life Expectancy Clearly, as people age they should expect to...

Biomedical Sciences: Future Life Expectancy Clearly, as people age they should expect to live for fewer additional years. The following graph gives the future life expectancy for Americans of different ages.

a. Letting x = Age, use linear regression to fit a line to the data. State the regression formula. [Hint: See Example 9.]

b. Interpret the slope of the line.

c. Use the regression line to estimate future longevity at age 25.

d. Would it make sense to use the regression line to estimate longevity at age 90? What future longevity would the line predict?

Source: National Center for Health Statistics