Final answer:
To find the image of the point (6, -7) after reflection over the line y = x, we swap the coordinates resulting in the image at (-7, 6), which is answer (d).
Step-by-step explanation:
The question asks about the image of a point after a reflection over the line y = x. To reflect the point (6, -7) over the line y = x, we swap the x and y coordinates. This results in the reflected point being the inverse of the original point, thus the image is at (-7, 6). Therefore, the correct answer is (d) (-7, 6).