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SAT数学:图像例题 6

2019-09-12 SAT-数学 阅读

SAT Question
Rank: Easy
Topic: Algebra, Interpreting Quadratic Graphs

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.

The graph of is shown. If the graph crosses the y-axis at the point (0, k), what is the value of k?
(A)2
(B)6
(C)10
(D)12

To begin, we are looking for the point in this graph where the curve touches the y-axis. This is the point where x=0.
To answer this question, we must substitute the value of 0 into our equation wherever we see x.

Therefore, our answer is D 12.

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