The Commutative Property of Multiplication states that changing the order of the factors does not change the product. In this case, the correct response that demonstrates this property is:
a × b = b × a
This shows that multiplying \( a \) by \( b \) yields the same result as multiplying \( b \) by \( a \).
The other expressions you listed represent different properties:
- \( a \times (-1) = -a \): This demonstrates how multiplication by -1 works but is not the commutative property.
- \( a \times (b \times c) = (a \times b) \times c \): This is the Associative Property of Multiplication.
- \( a \times 1 = a \): This shows the Identity Property of Multiplication.
So, the correct answer to show the Commutative Property of Multiplication is indeed:
a × b = b × a.