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OK, this equation is given as a of T equal point 3T plus 75,
where T is the number years after 1965 S Our slope is .3
years of age per year after 1965.
Letter B signifies the Y interceptor base year.
This mean this means that the life expectancy of an American
woman was 75 years.
Because if it's the Y intercept, we'd put zero in for the
variable and we would get 75.
Now 75 is the years of age for the year 1965 S In 1965, a
woman's life expectancy was 75.