6.
已知集合\(M=\{ \left.(x,y) \right|y=f(x)\} \),若对于任意实数对\(({x}_{1},{y}_{1})∈M \),存在\(({x}_{2},{y}_{2})∈M \),使\({x}_{1}{x}_{2}+{y}_{1}{y}_{2}=0 \)成立,则称集合\(M\)是“垂直对点集”,给出下列四个集合,其中是“垂直对点集”的序号是\((\) \()\)
\(①M=\{ \left.(x,y) \right|y= \dfrac{1}{{x}^{2}}\} \); \(②M=\{ \left.(x,y) \right|y={\log }_{2}x\} \);
\(③M=\{ \left.(x,y) \right|y={2}^{x}-2\} \); \(④M=\{ \left.(x,y) \right|y=\sin x+1\} \);