Working Age The projected ratio of the working-age population (25- to 64-year-olds) to the...

Working Age The projected ratio of the working-age population (25- to 64-year-olds) to the elderly shown in the figure below defines the ratio as a function of the year shown. If this function is defined as y = f(t) where t is the year, use the graph to answer the following:

a. What is the projected ratio of the working-age population to the elderly population in 2020?

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b. Estimate ƒ(2005) and write a sentence that explains its meaning.

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c. What is the domain of this function?

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d. Is the projected ratio of the working-age population to the elderly increasing or decreasing over the domain shown in the figure?