Final answer:
To reflect triangle P (2, 5), Q (6, 2), and R (2, 2) across the line y = x, swap the x and y coordinates of each point.
Step-by-step explanation:
To reflect triangle P (2, 5), Q (6, 2), and R (2, 2) across the line y = x, we need to swap the x and y coordinates of each point. So, the new vertices will be:
- P' (5, 2)
- Q' (2, 6)
- R' (2, 2)