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ZX-78CF68F90D2023年11月A卷 · 第 4 题
2023年11月A卷 · 原库模块 1 · Q4 原库参考解析
The function \( f\left(x\right)=\frac{1}{9}\left(x-6\right)^2+3 \) gives a toy car's height above the ground \( f\left(x\right) \), in inches, \( x \) seconds after it started moving on an elevated track, where \( 0\le x\le10 \). Which of the following is the best interpretation of the vertex of the graph of \( y=f\left(x\right) \) in the \( xy \)-plane?
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