It means, Point X is in more depth as compared to Point Y.
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Answer:
.5 and .5, .75 and .25, ect
Answer: Parallel lines are lines in a plane which do not meet; that is, two straight lines in a plane that do not intersect at any point are said to be parallel. Colloquially, curves that do not touch each other or intersect and keep a fixed minimum distance are said to be parallel.