Final answer:
The coordinates of point P after rotating it 90° counterclockwise would be (-5,2).
Step-by-step explanation:
To find the coordinates of point P after rotating it 90° counterclockwise, we need to switch the x and y coordinates and change the sign of the new x coordinate. For point P(2,-5), after rotating it 90° counterclockwise, the new coordinates would be (-5, -2). Hence, the correct answer would indeed be a) (-5,2), indicating a switch in the coordinates with a sign change for the new x-coordinate, exemplifying the result of rotating a point counterclockwise by 90° and showcasing the transformation of coordinates following this geometric operation.