(688,#9) Determine whether the points P(1,2,3), Q(0,3,7), R(3,5,11)

(688,#9) Determine whether the points P(1,2,3), Q(0,3,7), R(3,5,11) are collinear.
Solution: A sketch of the three points shows that they do not all lie on the same line, so they are not collinear.

by:sh