Final answer:
After a 90-degree clockwise rotation around the origin, the coordinates of the endpoints A'B' are A'(9,6) and B'(3,2).
Step-by-step explanation:
To find the coordinates of the endpoints A'B' after a 90-degree clockwise rotation around the origin, we use rotation transformation rules. The rule for a 90-degree clockwise rotation of a point (x, y) around the origin is (y, -x).
Applying this rule to point A ( -6,9 ), after rotation, we get A' (9,6). Similarly, applying the rule to point B ( -2,3 ), after rotation, we get B' (3,2). Therefore, the endpoints of line A'B' after the rotation are A'(9,6) and B'(3,2).