Question

what is the image of the point (-1,9) after a rotation of 180° counterclockwise about the origin? answer attempt 1 out of 2

Explanation:

Step1: Recall rotation rule

The rule for a 180 - degree counter - clockwise rotation about the origin is $(x,y)\to(-x,-y)$.

Step2: Apply the rule

Given the point $(-1,9)$, where $x=-1$ and $y = 9$. After rotation, $x$ becomes $-(-1)=1$ and $y$ becomes $-9$.

Answer:

$(1,-9)$