The population of a city, P, in thousands, is a function of t, the number of yea

Question

The population of a city, P, in thousands, is a function of t, the number of years since 1955, so P = f(t). Explain the meaning of the statement f(36) = 63 in terms of the population of the city. (Answer must be a complete sentence or complete sentences.) If we also know that f(23) = 27 and f(26) = 24 circle the statement below that is true: The population rose by 3 thousand people between 1978 and 1981 The population dropped by 3 thousand between 1978 and 1981 The population rose by 3 thousand between 1979 and 1982 The population dropped by 3 thousand between 1979 and 1982

Explanation / Answer

3). We have P = f(t), where P is the population of a city , in thousands, t years since 1955. If f(36) = 63, it means that the population of the city was 63000 , in the year 1955+36 i.e. in 1991.

Since 1955 +23 = 1978 and since 1955+26 = 1981, hence f(23) =27 and f(26) = 24, means that the population of the city dropped by 3 thousand between 1978 and 1981. The 3rd option is the correct answer.

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