3- please help! algebra

The number of millions of people in a certain country who lived below the poverty level for the year can be modeled by y=0.007x20.416x+45.396 where x is the number of years after 1990 . a. Is the vertex of the graph of this function a maximum or a 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. The number of millions of people in a certain country who lived below the poverty level for the year can be modeled by y=0.007x20.416x+45.396 where x is the number of years after 1990 . a. Is the vertex of the graph of this function a maximum or a 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