can someone help me with this question please?

Answer:
-5
Step-by-step explanation:
When rotating a point (x,y) 270 degrees counterclockwise, the new coordinates become (y, -x).
Answer:
(4, -5)
Step-by-step explanation:
Seeing as the coordinates of P are (5, 4) and it's a 270 degrees rotation, the transformation rule is:
[tex](x,y)[/tex] turns into [tex](y, -x)[/tex].
Thus, (5, 4) turns into (4, -5)