$\begin{align} \left\{ \begin{array}{1} x=-t\\ y=-t^2-2 \end{array} \right. \end{align} $
$t=$ 1
↓
t | x | y |
---|
7 | 8 | 9 | |
4 | 5 | 6 | |
1 | 2 | 3 | |
0 | . | +/− | C |
$\begin{align} \left\{ \begin{array}{1} x=-t\\ y=-t^2-2 \end{array} \right. \end{align} $
$t=$ 1
↓
t | x | y |
---|
7 | 8 | 9 | |
4 | 5 | 6 | |
1 | 2 | 3 | |
0 | . | +/− | C |