E=a*t+b
in 1991,
E=a*0 + b
70.8=b
in 1995
E=a*t+b
74.6=a*(1995-1991)+70.8
solve for a, then you have the equation for E(t).
In 1991, the life expectancy of males in a certain country was 70.8 years. In 1995, it was 74.6 years. Let E represent the life expectancy in year t and let t represent the number of years since 1991.. The linear function E(t) that fits the data is
E(t)=
(Round to the nearest tenth)
1 answer