Question

May I please get help with this where I have tried multiple times but still cannot find the right answers for them

Answer 1

Given a point with coordinates (x, y), to rotate 90º counterclockwise, the rule is:

$(x,y)\Rightarrow(-y,x)$

In thisc ase, we have the point:

$(2,-1)$

Applying the rule:

$(2,-1)\Rightarrow(1,2)$