Answer:
{(3,2), (7,4),(5,-1)}.
Step-by-step explanation:
To find the points reflected through y=x, you are really being asked to find the inverse relation. That means we are just swapping x and y per point; like (a,b) to (b,a).
So (2,3) when reflected through y=x becomes (3,2).
(4,7) when reflected through y=x becomes (7,4).
(-1,5) when reflected through y=x becomes (5,-1).
So the inverse relation is:
{(3,2), (7,4),(5,-1)}.