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ZX-C9599AF630Nonlinear functions · 第 21 题
Nonlinear functions · 原库模块 1 · Q21 原库参考解析
The function \( f\left(x\right)=\frac{1}{9}\left(x-7\right)^2+3 \) gives a metal ball's height above the ground \( f(x) \), in inches, x seconds after it started moving on a track, where \( 0\le x\le10 \) . Which of the following is the best interpretation of the vertex of the graph of y = \( f(x) \) in the xy-plane?
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