In 1995, the life expectancy of males in a certain country was 73.8 years. In 2001, it was 76.5 years. Let E represent the life expectancy in year t and let t represent the number of years since 1995. The linear function E(t) that fits the data is__. Use the function to predict the life expectancy of males in 2005 E(10)=

Answer 1

let 1995 correspond with t=0

then you have two ordered pairs
(0,73.8) and (6,76.5)

now find the slope and proceed as if you were finding the equation of a line in the form
y = mx + b or
E(t) = mt + b

Answer 2

drwls had answered the almost identical question here

http://www.jiskha.com/display.cgi?id=1282186087