The equation \( y = x \) means that for any value of \( x \), \( y \) will be the same value.
If you are given that the x-coordinate is 3, you can substitute that value into the equation:
\[ y = 3 \]
This gives you the ordered pair \( (3, 3) \).
However, since you're asking to determine an additional ordered pair from the answers A (1), B (6), C (9), and D (12), it's important to understand that these numbers refer to possible y-values given you're looking for a pair where \( y = x \).
In the context of the problem and looking for pairs from the options provided:
- If \( x = 6 \), then \( y = 6 \) giving us the ordered pair \( (6, 6) \).
- If \( x = 9 \), then \( y = 9 \) giving us \( (9, 9) \).
- If \( x = 12 \), then \( y = 12 \) giving us \( (12, 12) \).
Any of these options (B, C, or D) represent ordered pairs satisfying \( y = x \).
If you are specifically looking for another ordered pair where \( x \) is one of the answers provided, you would choose:
- B. \( (6, 6) \)
- C. \( (9, 9) \)
- D. \( (12, 12) \)
So any of these would be an additional ordered pair satisfying \( y = x \). If you need to choose just one, please clarify which specific answer you were referring to.