Each of Two Vectors, and , Lies Along

question 9

Multiple Choice

Each of two vectors, and , lies along a coordinate axis in the xy plane. Each vector has its tail at the origin, and the dot product of the two vectors is . Which possibility is correct?

• A) and both lie along the positive x axis.
• B) lies along the positive x axis. lies along the negative x axis.
• C) and both lie along the positive y axis.
• D) lies along the negative x axis. lies along the negative y axis.
• E) lies along the positive y axis. lies along the negative x axis.

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