Question

In 1994, the life expectancy of males in a certain country was 64.8 years. In 2000, it was 67.5 years. Let E represent the life expectancy in year t and let t represent the number of years since 1994. E(t)=______ t + ______. Use the function to predict the life expectancy od males in 2003. E(9)=______.
Round both to the nearest tenth.

Answer 1

Life expectancy increases 0.45 years per year. I got that by dividing (67.5-64.8) by 6 years

E(t) = 64.8 + 0.45 t

2003 is year t = 9. Use the formula above to compute E(9)