Algebra

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In 1992, the life expectancy of males in a certain country was 69.8 years. In 1999, it was 72.6 years. Let E represent life expectancy in year t, and let t represent the numbers of years since 1992.

  • Algebra -

    OK. And then what ?

    You certainly cannot expect E to increase 2.8 years per 7 years (0.4 years per year) indefinitely.

    Past performance is no guarantee of future results, but it might work for a year or two.

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