We have the following:
When rotating a point 270 degrees counterclockwise about the origin our point A(x,y) becomes A'(y,-x). This means, we switch x and y and make x negative
Therefore:
[tex]\begin{gathered} (x,y)\Rightarrow(y,-x) \\ D(-3,2)\Rightarrow D^{\prime}(2,3) \\ E(-1,4)\Rightarrow E^{\prime}(4,1) \end{gathered}[/tex]
