In 1995, the life expectancy of males in a certain country was 70.1 years. In 1999, it was 73.6 years. Let E represent the number of years since 1995.
The linear function E(t) that fits the data is E(t) =_____ t +______.(Round to the nearest tenth)
Use the function to predict the life expectancy of males in 2004.
E(9) =_____.(Round to the nearest tenth)
Two given points are
for year 1995, P1(0,70.1) and
for year 1999, P2(4,73.6)
The linear function that passes through these two points is given by:
(y-y1)/(y2-y1)=(x-x1)/(x2-x1)
Substitute x1=0,y1=70.1, x2=4,y2=73.6, solve for y in terms of x.
If you wish, you could post your answer for checking.