$\left\{ $$\begin{aligned}\overrightarrow{x} &= (1,-1)\\ \overrightarrow{y} &= (2,1)\end{aligned}$$ \right.$

$\left\{ $$\begin{aligned}\overrightarrow{x} &= (-1,-2)\\ \overrightarrow{y} &= (4,2)\end{aligned}$$ \right.$

$\left\{ $$\begin{aligned}\overrightarrow{x} &= (1,-1)\\ \overrightarrow{y} &= (4,2)\end{aligned}$$ \right.$

$\left\{ $$\begin{aligned}\overrightarrow{x} &= (2,-2)\\ \overrightarrow{y} &= (1,2)\end{aligned}$$ \right.$

$\left\{ $$\begin{aligned}\overrightarrow{x} &= (3,0)\\ \overrightarrow{y}&=(-2,4)\end{aligned}$$ \right.$

$\left\{ $$\begin{aligned}\overrightarrow{x} &= (5,0)\\ \overrightarrow{y}&=(2,4)\end{aligned}$$ \right.$

$\left\{ $$\begin{aligned}\overrightarrow{x} &= (3,0)\\ \overrightarrow{y}&=(2,4)\end{aligned}$$ \right.$

$\left\{ $$\begin{aligned}\overrightarrow{x} &= (5,0)\\ \overrightarrow{y}&=(-2,4)\end{aligned}$$ \right.$

$\left\{ $$\begin{aligned}\overrightarrow{x} &= (8,2)\\ \overrightarrow{y}&=(-7,1)\end{aligned}$$ \right.$

$\left\{ $$\begin{aligned}\overrightarrow{x} &= (-4,2)\\ \overrightarrow{y}&=(3,1)\end{aligned}$$ \right.$

$\left\{ $$\begin{aligned}\overrightarrow{x} &= (8,2)\\ \overrightarrow{y}&=(3,1)\end{aligned}$$ \right.$

$\left\{ $$\begin{aligned}\overrightarrow{x} &= (-4,2)\\ \overrightarrow{y}&=(-7,1)\end{aligned}$$ \right.$

$\left\{ $$\begin{aligned}\overrightarrow{x} &= (1,2)\\ \overrightarrow{y}&=(2,2)\end{aligned}$$ \right.$

$\left\{ $$\begin{aligned}\overrightarrow{x} &= (2,3)\\ \overrightarrow{y}&=(1,1)\end{aligned}$$ \right.$

$\left\{ $$\begin{aligned}\overrightarrow{x} &= (1,3)\\ \overrightarrow{y}&=(2,1)\end{aligned}$$ \right.$

$\left\{ $$\begin{aligned}\overrightarrow{x} &= (2,2)\\ \overrightarrow{y}&=(1,2)\end{aligned}$$ \right.$

$\left\{ $$\begin{aligned}\overrightarrow{x} &= (-3,1)\\ \overrightarrow{y} &= (-1,-2)\end{aligned}$$ \right.$

$\left\{ $$\begin{aligned}\overrightarrow{x} &= (2,2)\\ \overrightarrow{y} &= (2,-8)\end{aligned}$$ \right.$

$\left\{ $$\begin{aligned}\overrightarrow{x} &= (2,1)\\ \overrightarrow{y} &= (2,-2)\end{aligned}$$ \right.$

$\left\{ $$\begin{aligned}\overrightarrow{x} &= (-3,2)\\ \overrightarrow{y} &= (-1,-8)\end{aligned}$$ \right.$