The life expectancy for men born in 1980 is 70.0
years, and the life expectancy for men born in 2000
is 74.3 years. Let x represent the number of birth
years after 1960 and y male life expectancy. Write a
linear function that models life expectancy, E(x), for
American men born x years after 1960. Use the
function to project the life expectancy of American
men born in 2020.



Answer :