AMC8 2001

AMC8 2001 · Q19

AMC8 2001 · Q19. It mainly tests Functions basics, Rates (speed).

Car M traveled at a constant speed for a given time. This is shown by the dashed line. Car N traveled at twice the speed for the same distance. If Car N's speed and time are shown as solid line, which graph illustrates this?

汽车M以恒定速度行驶了一段时间。这由虚线所示。汽车N以两倍速度行驶相同的距离。如果汽车N的速度和时间由实线所示，哪张图示意了这一点？

(A)

(B)

(C)

(D)

(E)

Answer

Correct choice: (D)

正确答案：（D）

Solution

The second car travels the same distance at twice the speed; therefore, it needs half the time required for the first car. Graph D shows this relationship.

第二辆车以两倍速度行驶相同距离；因此，它需要第一辆车所需时间的一半。图D显示了这种关系。

Topics