1957 AMC 12 第 16 题
先试着解答 1957 AMC 12 第 16 题，然后核对你的答案与精心整理的解答，解答来自 LIVE by Po-Shen Loh。你也可以参加完整限时模拟考试、查看全部 1957 AMC 12 解答，或核对答案。
所有题目均经美国数学协会（MAA）官方合法授权使用。
16.
金鱼每条售价 美分。表示购买 至 条金鱼所需费用的直角坐标图为：
Goldfish are sold at cents each. The rectangular coordinate graph showing the cost of to goldfish is:
一条直线段
a straight line segment
一组水平的平行线段
a set of horizontal parallel line segments
一组竖直的平行线段
a set of vertical parallel line segments
有限个互不相同的点
a finite set of distinct points
一条直线
a straight line
小提示：
判断金鱼的条数是连续变化，还是只能取整数
Decide whether the number of fish varies continuously or only through whole numbers
大提示：
从 到 的每个整数条数各对应一个费用点
There is one cost point for each integer count from through
解答：
关系 是线性的，但金鱼条数 只能是十二个整数 中的一个。因此，图像由十二个互不相同的点组成，而不是整条直线或线段。
因此，正确答案是 D。
The rule is linear, but the number of goldfish can only be one of the twelve integers The graph therefore consists of twelve distinct points, not an entire line or segment.
Thus, the correct answer is D.
其他年份的第 16 题
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