If you multiply a matrix representing a polygon by a 2 x 2 matrix having rows of 0, 1 and -1, 0, what is the result?
A)A translation of 1 unit to the right.
B)A reflection over the x-axis.
C)A reflection over the y-axis.
D)A clockwise rotation of 90°.
E)A counter clockwise rotation of 90°.

Question

Quizplus · Accepted Answer

Multiplying a matrix representing a polygon by a 2 x 2 matrix with rows of 0, 1 and -1, 0 results in a clockwise rotation of 90 degrees. This transformation matrix rotates points in the Cartesian coordinate system about the origin.

If You Multiply a Matrix Representing a Polygon by a 2