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SAT数学:图像例题 2

2019-08-24 SAT-数学 阅读

SAT Question 7 Article
Rank: Easy
难度: 简单
Topic: Algebra, Interpretting Quadratics
话题: 代数,解释图像
 

 
Below is a question from a recent SAT exam. It is a non-calculator question that would typically take a student 1-2 minutes to complete.
下面是最近SAT考试中的一个问题。此问题不可使用计算机,学生通常需要1-2分钟来完成。

 
The graph of y = f (x) is shown in the xy-plane. What is the value of f (0)?
y = f (x)在xy平面上表示。f(0)的值是多少?
(A) 0
(B) 2
(C) 3
(D) 4
 

To answer this question we need to realise that we are looking for the value of y when x=0, We can see this from the question as we are told that y=f(x).

 

 
为了回答这个问题,我们需要知道在x=0时y的值。从题中可以得出,y=f(x)是已知条件
 
So by drawing a line straight up from the origin to the curve we can see that when x=0, y=4. Therefore, f(0)=4
通过从原点到曲线的直线可以看出,当x=0 时,y=4。因此, f (0)= 4


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