Point c does not lie on xy. can point c lie in the same plane as xy?

Assuming that XY refers to a line made by points X and Y and we have another point which is point C. Yes this is correct; point C can be in the same plane as XY but not necessarily lie on XY. This is because two points create a line while 3 non collinear points create a plane.

answer: a.   one is a factor of every whole number since every number is divisible by itself.