A point (x, y, z) moves parallel to xy?plane. Which of the three variables x, y, z remain fixed

A point (x, y, z) moves parallel to xy?plane. Which of the three varia

1.	A point (x, y, z) moves parallel to xy?plane. Which of the three variables x, y, z remain fixed
A.	z
B.	y
C.	x
D.	x and y
Answer» B. y

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A point (x, y, z) moves parallel to xy?plane. Which of the three variables x, y, z remain fixed

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