The solution set of \( x \leq 3.4 \) is:
B. \( x \leq 3.4 \)
Explanation:
- The inequality \( x \leq 3.4 \) means that \( x \) can take any value less than or equal to 3.4.
- Option B correctly represents this solution set by stating that \( x \) is less than or equal to 3.4.