Final answer:
The coordinates of point B, which is the reflection of point A (6 5/8, -4) over the y-axis, are (-6 5/8, -4).
Step-by-step explanation:
When a point is reflected over the y-axis, its x-coordinate changes sign while its y-coordinate remains the same. The coordinates of point A are (6 ¾, -4). To find the coordinates of point B, which is point A reflected over the y-axis, we take the opposite of the x-coordinate of point A and keep the y-coordinate the same. Therefore, the coordinates of point B are (-6 ¾, -4).