已知:如图,\(∠MON = 90^{\circ}\),\(\triangle ABC\)中,\(∠C = 90^{\circ}\),\(AC = 3cm\),\(BC = 4cm\),将\(\triangle ABC\)的两个顶点\(A\)、\(B\)放在射线\(OM\)和\(ON\)上移动,作\(CD⊥ON\)于点\(D\),记\(OA = x(\)当点\(O\)与\(A\)重合时,\(x\)的值为\(0)\),\(CD = y\).小明根据学习函数的经验,对函数\(y\)随自变量\(x\)的变化而变化的规律进行了探究.
下面是小明的探究过程,请补充完整:
\((1)\)通过取点、画图、测量等方法,得到了\(x\)与\(y\)的几组值,如下表\((\)补全表格\()\):
\(x/cm\) | \(0\) | \(1\) | \(2\) | \(3\) | \(4\) | \(4.5\) | \(5\) |
\(y/cm\) | \(2.4\) | \(3.0\) | \(3.5\) | \(3.9\) | \(4.0\) | \(3.9\) | |
\((\)说明:补全表格时相关数值保留一位小数\()\)
\((2)\)建立平面直角坐标系,描出以补全后的表中各对对应值为坐标的点,画出该函数的图象.
\((3)\)当\(x\)的值为_______时,线段\(OC\)长度取得最大值为____________\(cm\).