11. Reason quantitatively. Use your answer from Item 9 to write a conjecture about the symbolic representation for a 270° counterclockwise rotation.
(x,y) → ( , )
Experienced College Math Tutor
Note that it's the same as rotating 90º clockwise. As rotation is a linear transformation, we have T(x, y) = xT(1, 0) + yT(0, 1) = x(0, -1) + y(1, 0) = (y, -x), where T is the rotation transformation.
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