QUESTION IMAGE
Question
what is the image point of (-6, 1) after the transformation $r_{180}circ d_{4}$? answer attempt 1 out of 2
Step1: 先进行缩放变换
缩放变换 \(D_4\) 是将点的横、纵坐标都乘以 \(4\)。对于点 \((- 6,1)\),经过 \(D_4\) 变换后,新的坐标为 \((-6\times4,1\times4)=(-24,4)\)。
Step2: 再进行旋转变换
旋转变换 \(R_{180^{\circ}}\) 的规则是 \((x,y)\to(-x,-y)\)。对于点 \((-24,4)\),经过 \(R_{180^{\circ}}\) 变换后,坐标变为 \((-(-24),-4)=(24,-4)\)。
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\((24,-4)\)