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A Lady Bug Moves on the Xy-Plane According the The Equations

Question 86

Multiple Choice

A lady bug moves on the xy-plane according the the equations $x=2 t(t-8)$ , $y=2-t$ . When is the lady bug ever moving straight up or down?

A) When t = 8
B) When t = 4
C) When t = 2
D) Never

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