Answer:
270°-clockwise rotation [90°-counterclockwise rotation]
Step-by-step explanation:
Now, a 90°-clockwise rotation is the exact same as a 270°-counterclockwise rotation, and according to the 270°-counterclockwise rotation [90°-clockwise rotation] rule, you take the y-coordinate, bring it over to your new x-coordinate, and take the OPPOSITE of the x-coordinate and set it as your new y-coordinate:
Extended Rotation Rules
270°-clockwise rotation [90°-counterclockwise rotation] >> (x, y) → (-y, x)
270°-counterclockwise rotation [90°-clockwise rotation] >> (x, y) → (y, -x)
180°-rotation >> (x, y) → (-x, -y)
So, perform your rotation:
270°-counterclockwise rotation [90°-clockwise rotation] → [1, 3] moves to [-3, 1]
I am joyous to assist you anytime.
