Answer:
90 degree counter clockwise rotation.
Explanation:
We want to find the transformation on S;
[tex]S(x,y)\rightarrow(-y,x)[/tex]
Recall that the 90 degree counter clockwise rotation from 1st quadrant to 2nd quadrant can be represented as;
[tex](x,y)\rightarrow(-y,x)[/tex]
Therefore, the transformation in S is a 90 degree counter clockwise rotation.
