To find the coordinates of the point \( Y'(x', y') \) after a 180° counterclockwise rotation about the origin, we can use the following transformation:
\[ (x', y') = (-x, -y) \]
Starting with the coordinates of point \( Y(-2, 6) \):
- The new x-coordinate will be: \(-(-2) = 2\)
- The new y-coordinate will be: \(-6\)
So, the coordinates of point \( Y' \) after the rotation will be:
\[ Y'(2, -6) \]
Therefore, the answer is:
Y′(2,−6)