Problem

BIOMEDICAL SCIENCES: Life Expectancy The following tables give the life expectancy for a n...

BIOMEDICAL SCIENCES: Life Expectancy The following tables give the life expectancy for a newborn child born in the indicated year. (Exercise 71 is for males, Exercise 72 for females.)

Birth Year	1960	1970	1980	1990	2000
Life Expectancy (male)	66.6	67.1	70.0	71.8	74.4

a. Number the data columns with x-values 1–5 and use linear regression to fit a line to the data. State the regression formula. [Hint: See Example 8.]
b. Interpret the slope of the line. From your answer, what is the yearly change in life expectancy?
c. Use the regression line to predict life expectancy for a child born in 2025 (this might be your child or grandchild).

Source: U.S. Census Bureau

Example 8 LINEAR REGRESSION USNG A GRAPHING CALCULATOR