To find the output of the function \( y = 3x + 6 \) when \( x = 0.3 \), we can substitute \( x \) with \( 0.3 \):
\[ y = 3(0.3) + 6 \]
Calculating this step by step:
- Multiply \( 3 \) by \( 0.3 \):
\[ 3 \times 0.3 = 0.9 \]
- Add \( 6 \) to the result:
\[ 0.9 + 6 = 6.9 \]
Thus, when \( x = 0.3 \), the output \( y \) is \( 6.9 \).
The correct response is 6.9.