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Mathematics>Standard Multiple Choice

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

The graph of y = f(x) is shown above. If 0 less than or equal to t less than or equal to 5, and if (t，v) is on the graph of function f, which of the following must be true?

(A)-10 less than or equal to v less than or equal to -5
(B)-5 less than or equal to v less than or equal to 0
(C) 0 less than or equal to v less than or equal to 5
(D) 5 less than or equal to v less than or equal to 10
(E) 10 less than or equal to v less than or equal to 15

答案和解析

答案：D

解析：

The second coordinate of a point on the graph corresponds to v. From the graph, you can see that for 0 less than or equal to t less than or equal to 5, the smallest value of v is 5 and the greatest value is 10, so 5 less than or equal to v less than or equal to 10.