1993 life expectancy of males was 64.8 yrs. in 1997 it was 67.4 yrs. E=life expectancy in year t and t=number of years since 1993E(t)=___t+____ E(13)=_____

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Find the slope to find the rate it increases per year:( 67.4 - 64.8 ) / ( 1997 - 1993 )this simplifies to .65Next find the intercept -- the initial value. This would have to be 64.8 because the first year is 1993 and the life expectancy for that year was.. 64.8you can now simply write the function as: E( t ) = 0.65t + 64.8