Question 577836
in 5 years, the life expectancy increased by 2.7 years ___ it increases .54 yr per yr ___ this is the slope (m) of the linear function


E(t) = .54t + b ___ to find the constant term (intercept), plug in a data point


E(5) = .54(5) + b ___ 66.9 = 2.7 + b ___ 64.2 = b ___ this makes sense because 1990 was the base year


E(t) = .54(t) + 64.2


2004 is 14 years since 1990 ___ substitute 14 for t to predict the life expectancy