Rotation [tex]R_{O,270^{\circ}}[/tex] by [tex]270^{\circ}[/tex] anti-clockwise about the origin has the rule:
[tex](x,y)\rightarrow (y,-x).[/tex]
Points M and N have coordinates (5,9) and (4,3), respectively.
Find the coordinates of ratation image points M' and N':
[tex]M(5,9)\rightarrow M'(9,-5).[/tex]
[tex]N(4,3)\rightarrow N'(3,-4).[/tex]
Answer: M'(9,-5), N'(3,-4)
