In 1991, the life expectancy of males in a certain country was 67.2 years. In 1995, it was 71.1 years. Let E represent the life expectancy in year t and let t represent the number of years since 1990.

Question

The linear function E(t) that fits the data is
E(t) =?t + ?
(Round to the nearest tenth)

Answer 1

you will find that the question contained in
http://www.jiskha.com/display.cgi?id=1305681090

has the same setup as yours, just change the numbers and follow my method.