To rotate a point \( (x, y) \) 180° clockwise around the origin, the new coordinates can be found using the following transformation:
\[ (x', y') = (-x, -y) \]
For the point \( (3, -5) \):
- Apply the transformation: \[ x' = -3 \] \[ y' = 5 \]
Thus, after rotating the point \( (3, -5) \) 180° clockwise, the new point is \( (-3, 5) \).