Final answer:
When reflecting a point across the line y = x in Geometry, you swap the x-coordinate with the y-coordinate.
Step-by-step explanation:
When reflecting a point across the line y = x in Geometry, you swap the x-coordinate with the y-coordinate. So, if the original point is (x, y), the reflected point would be (y, x).
For example, if the original point is B(3, 4), the reflected point B' would be (4, 3). Similarly, for the points S(-2, 5), R(1, -2), and J(0, 0), the reflected points would be S'(5, -2), R'(-2, 1), and J'(0, 0) respectively.