Question

in 1990 the life expectancy of males in a certain country was 67.2 years in 1994 it was 70.9 years. let e represent the life expectancy in year t and let t represent the number of years since 1990
e(t)= t+
use the function to predict the life expextancy of males in 2007
e(17)=

Answer 1

let the relation be linear so e(t)=.925t++67.2

so for 1990 t=0 and e(0)=67.2
for 1994 t=4 e(4)=.925*4+67.2=70.9
e(17)=17*.925+67.2=82.925