When a point \((x, y)\) is reflected across the y-axis, the x-coordinate changes sign while the y-coordinate remains the same.
For point K with coordinates \((6, 3)\):
- The new x-coordinate will be \(-6\).
- The y-coordinate remains \(3\).
Therefore, the new coordinates for the reflected point K would be \((-6, 3)\).
The correct response is:
(−6, 3)