下面是2013年2月9日的SAT官方每日一题的内容，是关于数学方面的，题型是选择。SAT官方每日一题是collegeboard每天都会发布的题目，关于SAT考试的三个部分的各个题型。下面我们就一起来看一下这个SAT官方每日一题吧。
SAT官方每日一题之数学---选择：
Mathematics > Standard Multiple Choice
Read the following SAT test question and then click on a button to select your answer.
The
cars in a car service use a total of
gallons of gasoline per week. If each of the cars uses the same amount of gasoline, then, at this rate, which of the following represents the number of gallons used by
of the cars in
weeks?
(A)
(B)
(C)
(D)
(E)
Right-o!
Explanation
The car service uses a total of
gallons of gasoline per week, and each of the cars uses the same amount of gasoline, so each of the
cars uses
gallons of gasoline per week. Therefore,
of the cars use a total of
gallons per week. It follows that
of the cars use
gallons of gasoline in
weeks.
下面是一道和SAT官方每日一题相似的题目，供大家练习：
Which of the following could be the equation of the function graphed in the 
above?
Answer Choices
(A) 
(B) 
(C) 
(D) 
(E) 
The correct answer is D
Explanation
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
.
以上就是关于2013年2月9日SAT官方每日一题中数学部分的详细内容，包括了题目和选项以及答案，后面附有一道相关的练习题。大家可以在备考SAT的过程中关注SAT每日一题的内容，这样就可以更好有不间断的练习，也就能在日积月累的过程中得到提高。
