In 1993, the life expectancy of males in a certain country was 70.9 years. In 1997 it was 73.1 years. Let E represent the life expectancy in year t and let t represent the nbr of years since 1993.

the linear function E(t) that fits the data is
E(t) = ?t + ?

Question

In 1993, the life expectancy of males in a certain country was 70.9 years.  In 1997 it was 73.1 years.  Let E represent the life expectancy in year t and let t represent the nbr of years since 1993.

the linear function E(t) that fits the data is
E(t) = ?t + ?

anonymous · Answer

This is my last question and I have 5 minutes to submit this or they will deduct 10 percent off my grade.  So pleeeaaassse help.

anonymous · Answer

we know the second ? mark will be 70.9, since when t is 0 it E(t) must equal 70.9. E(t)=?t+70.9 After 4 years it's 73.1, so.. 73.1=?*4+70.9 2.2=?*4 .55=? E(t)=.55t+70.9