? ^_^ Member Oct 3, 2011 #1 For the given set and relation below determine which define equivalence relation a) S is the set of real numbers, a ~ b if a = +/- b b) S is the set of all straight lines in the plane, a ~ b if a is parallel to b.
For the given set and relation below determine which define equivalence relation a) S is the set of real numbers, a ~ b if a = +/- b b) S is the set of all straight lines in the plane, a ~ b if a is parallel to b.