Yes, the expression \( y \cdot 3x \) is equivalent to \( 3xy \).
To show this, you can rearrange the terms in \( y \cdot 3x \):
\[ y \cdot 3x = 3 \cdot y \cdot x = 3xy \]
Thus, \( y \cdot 3x \) simplifies to \( 3xy \), confirming that they are equivalent.