To find the coordinates of a point \( D' \) after a reflection over the y-axis, you need to know the original coordinates of the point \( D \).
If the coordinates of point \( D \) are given as \( (x, y) \), then the coordinates after reflecting over the y-axis will be \( D' = (-x, y) \).
For example:
- If point \( D \) is at \( (3, 4) \), then after reflection over the y-axis, \( D' \) would be at \( (-3, 4) \).
- If point \( D \) is at \( (-2, 5) \), then \( D' \) would be at \( (2, 5) \).
Please provide the coordinates of point \( D \) if you need a specific calculation.