# SOLUTION: Ok this problem is really confusing, I feel like I might know what to do but I cannot remember the formula to do it. In 1992, the life expectancy of males in a certain country was

Algebra ->  Algebra  -> Functions -> SOLUTION: Ok this problem is really confusing, I feel like I might know what to do but I cannot remember the formula to do it. In 1992, the life expectancy of males in a certain country was      Log On

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 Algebra: Functions, Domain, NOT graphing Solvers Lessons Answers archive Quiz In Depth

 Click here to see ALL problems on Functions Question 174035: Ok this problem is really confusing, I feel like I might know what to do but I cannot remember the formula to do it. In 1992, the life expectancy of males in a certain country was 61.7 years. In 1997, it was 64.5 years Let E express the life expectancy in year t and let t represent the number of years since 1992. The linear function E(t) that fits the data is E(t)=__t+__ Use the function to predict the life expectancy of males in 2005. E(13)=?Answer by stanbon(57979)   (Show Source): You can put this solution on YOUR website!In 1992, the life expectancy of males in a certain country was 61.7 years. In 1997, it was 64.5 years Let E express the life expectancy in year t and let t represent the number of years since 1992. --------- You have two points of the form (t,E) One is (0,61.7) ; this is the intercept for the equation. ------------- The other is (5,64.5) ------------------------- slope = (64.5 - 61.7)/(5-0) = 2.8/5 = 0.56 ------ The linear function E(t) that fits the data is E(t)=_0.56t+61.7 ------------------ Use the function to predict the life expectancy of males in 2005. E(13) = 0.56*13 + 61.7 = 68.98 years ======================================== Cheers, Stan H.