In most societies, women say they prefer to marry men who are older than themselves, whereas men say they prefer women who are younger. The bar graph shows the preferred age difference in a mate in five selected countries. Use this information to solve Exercises 65–66.a. Consider a function, f, whose domain is the set of the five countries shown in the graph. Let the range be the set of the average number of years women in each of the respective countries prefer men who are older than themselves. Write the function f as a set of ordered pairs.

b. Write the relation that is the inverse of f as a set of ordered pairs. Based on these ordered pairs, is f a one-to-one function? Explain your answer.

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Preferred Age Difference Years Older Than Self Years Younger Than Self do LAN LOHNWASO -2 -6 4.2 -7.3 Preferred Age Difference in a Mate 4.5 -4.5 3.3 ---2.8 Zambia Colombia Poland Country 3.3 -2.8 -2.5. Italy -1.9 Women Men United States