Answer:
see explanation
Explanation:
Under a clockwise rotation about the origin of 90°
a point (x, y ) → (y, - x ) , then
R(2, - 1 ) → R'(- 1, - 2 )
S(4, 0 ) → (0, - 4 )
T(1, 3 ) → T'(3, - 1 )
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