When a point is reflected over the y-axis, the x-coordinate of the point changes sign, while the y-coordinate remains the same.
Given the point Q (0, -8):
- The x-coordinate is 0, which means that reflecting it over the y-axis will still result in an x-coordinate of 0.
- The y-coordinate remains -8.
Thus, the coordinates of the image Q' after reflection over the y-axis are (0, -8).
So the correct answer is: b. (0, -8)