To prove the equivalence of the expressions \( y \cdot 3x \) and \( 3xy \) using the Commutative Property, we can rearrange the terms:
- Starting with Expression 1: \( y \cdot 3x \)
- By the Commutative Property, we can rearrange it as \( 3 \cdot (y \cdot x) \).
- We can further apply the Commutative Property to get \( 3xy \).
Thus, \( y \cdot 3x = 3xy \).
This shows that both expressions are equivalent because multiplication is commutative, allowing us to rearrange the factors without changing the product.