To factor the expression \( 12y + 6 \) using the Greatest Common Factor (GCF), we first identify the GCF of the two terms.
The GCF of \( 12y \) and \( 6 \) is \( 6 \).
Now, we factor \( 6 \) out of the expression:
\[ 12y + 6 = 6(2y + 1) \]
So, the factored form of \( 12y + 6 \) is \( 6(2y + 1) \).