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2025年12月美国A卷 · 第 11 题

2025年12月美国A卷 · 原库模块 1 · Q11 原库参考解析

The function \( f(x)=-x(x-401) \), where \( 0\le x\le401 \), gives the speed, in meters per second, of a particle x seconds after it started traveling. If the function \( f \) is graphed in the xy-plane, where \( y=f(x) \), which statement is the best interpretation of the point (1, 400) on the graph?
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