Question

question what is the image point of (0, -7) after the transformation $r_{y - axis} circ r_{180^{circ}}$? answer attempt 2 out of 2

Explanation:

Step1: 先进行180度旋转

点$(x,y)$绕原点旋转180度后的坐标为$(-x,-y)$，对于点$(0, - 7)$，旋转后为$(0,7)$。

Step2: 再进行y轴反射

点$(x,y)$关于y轴反射后的坐标为$(-x,y)$，对于点$(0,7)$，反射后还是$(0,7)$。

Answer:

$(0,7)$