2013-12-03 11:38:39 来源: 互联网 责编:楷维留学指南
2013年11月15日SAT真题
SAT真题类型:Mathematics > Standard Multiple Choice 数学选择
Read the following SAT test question and then click on a button to select your answer.
Which of the following could be the equation of the function graphed in the
above?
(A)![]()
(B)![]()
(C)![]()
(D)![]()
(E)![]()
解析: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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