in 1990 the life expectancy of females (in the U.S.) was 78.8. in the year 2000, it was 79.8. let f(t) represent the life expectancy and t the number of years since 1990.

a. Find a linear function that fits the data.

b. Use this function to estimate the life expectancy of females in 2008

If some one could please help me I would be sooooo greatful