【SAT官方每日一题】16/8/12 Mathematics > Standard Multiple Choice

滚吧肥汤圆UID: 3272378

Read the following SAT test question and then click on a button to select your answer.

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Which of the following could be the equation of the function graphed in the above?
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A.   

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D.   
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E.   

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解析:
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The function with equation   and the function with equation   each have a minimum value of   when , but the function graphed does not have a minimum value of  , so these options cannot be correct. The graph of the function with equation   contains the point , but the function graphed does not contain any points with negative , so this option cannot be correct. The graph of the function with equation  is not symmetric with respect to the , so it cannot be the equation of the function graphed. Therefore, the only equation that could correspond to the function graphed is . Its graph is the absolute value of a parabola opening upward with vertex at .

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