Respuesta :

Answer:

when P(x,y) is reflected in y=x line then

P(x,y) = P(y,x)

A(2, -1)= A(-1, 2)

B(-2, -1) = B(-1, -2)

C(2, 1)= C(1, 2)

D(1,2)= D(2,1)

Step-by-step explanation: