If 8 = x and x = y, then 8 = y is an example of which algebraic property? a. symmetric property b. transitive property c. reflexive property d. commutative property of multiplication

That is very definitely the transitive property! Symmetric says that x = y and y = x (nothing else figures in but those 2 things), reflexive property says that x = x and y = y.  Commutative property of multiplication says that if 2 times 3 = 6, then 3 times 2 also = 6.