Given vectors vector u with components negative two comma three and vector v with components negative six comma nine , what is the measure of the angle between vector u and vector v ?

The vector v = (−6, 9) is 3 times vector u = (−2, 3). Since the scale factor is positive, the vectors point in the same direction, so the angle between them is 0 degrees. The correct choice is B, 0 degrees.

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