To rotate a point (x, y) 180° clockwise, you can use the transformation rule:
\[ (x, y) \rightarrow (-x, -y) \]
For the point (3, -5), applying this rule gives:
\[ (3, -5) \rightarrow (-3, 5) \]
So, the new point after rotating (3, -5) 180° clockwise is \((-3, 5)\).