QUESTION IMAGE
Question
graph this equation:
$x=-4$
click to select points on the graph.
Step1: 分析方程性质
方程\(x = - 4\)表示一条垂直于\(x\)轴的直线,因为对于任意的\(y\)值,\(x\)恒为\(-4\)。
Step2: 确定直线上的点
在坐标系中,当\(y = 0\)时,点为\((-4,0)\);当\(y = 2\)时,点为\((-4,2)\);当\(y=-2\)时,点为\((-4,-2)\)等。连接这些点,就可以得到\(x = - 4\)的图像。
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在坐标系中,过点\((-4,0)\)、\((-4,2)\)、\((-4,-2)\)等(\(x\)坐标为\(-4\),\(y\)坐标任意)作垂直于\(x\)轴的直线,即为方程\(x=-4\)的图像。