The reflection of coordinate points across the line y = x results in the transformation
[tex]P(x,y)\rightarrow P^{\prime}(y,x)[/tex]
Applying the transformation on the given coordinate points, we will get
[tex]\begin{gathered} R(-5,-5)\rightarrow R^{\prime}(-5,-5) \\ S(-3.-4)\rightarrow S^{\prime}(-4,-3) \\ T(-3,-5)\rightarrow T^{\prime}(-5,-3) \end{gathered}[/tex]
