Problem

Use a graphing calculator to do Exercise 70.The following table shows the average remainin...

Use a graphing calculator to do Exercise 70.

The following table shows the average remaining life expectancy (in years) for a person in the United States at selected ages.

Current Age

Birth

20

40

60

80

90

100

Life Expectancy

77.8

58.8

39.9

22.6

9.2

5.0

2.6

(a) Let birth = 0, and plot the data points.


(b) Use quartic regression to find a fourth−degree polynomial f(x) that models the data.


(c) What is the remaining life expectancy of a person of age 25? age 35? age 50?


(d) What is the life expectancy of a person who is exactly your age?

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