Question: Let V (t) be the number of visitors (in million) on the year that is t years since 1960. Use the Linear Regression features of graphing calculator and the information on the table given below.
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Visitors to the Grand Canyon
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Year
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Average monthly participation (million)
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1960
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1.2
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1970
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2.3
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1980
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2.6
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1990
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3.8
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2000
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4.8
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A model for United State population is U(t) = 0.0068t2 + 2.17t + 180.41, where U(t) is the United State population (in million) at t years since 1960. Let P(t) be the percentage of Americans who visit the Grand Canyon in the year that is t years since 1960. Find an equation for P. Find P(50).