Question

In 1992, the life expectancy of males in a certain country was 65.4 years. In 1998, it was 67.5 years. Let E represent the life expectancy in year t and let t represent the number of years since 1992. E(t)=_t+_ Use the function to predict the life expectancy of males in 2004.

Answer 1

(1992, 65.4) and (1998, 67.8)

slope = 0.4

so

E(t)= 0.4t+65.4

Answer 2

2004 - 1992 = 12


E(t)= 0.4t+65.4

E(t)= 0.4(12)+65.4
E(12) = 70.2