Poverty The number of millions of people in the United States who lived below the poverty level for the years 1993 to 2009 can be modeled by y = 0.114x2 − 2.322x + 45.445, where x is the number of years after 1990.
a. Is the vertex of the graph of this function a maximum or minimum?
b. Find the coordinates of the vertex and interpret them in the context of the problem.
c. Use the vertex to set the window and graph the model.
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