\[y = - \frac{9}{x}\]
| \[x\] | \[- 1\] | \[1\] | \[- 3\] | \[3\] | \[9\] | \[- 9\] |
|---|---|---|---|---|---|---|
| \[y\] | \[9\] | \[- 9\] | \[3\] | \[- 3\] | \[- 1\] | \[1\] |

\[= - 6 \Longrightarrow y = - \frac{9}{- 6} = 1,5\]
\[x = - 2 \Longrightarrow y = \frac{- 9}{- 2} = 4,5\]
\[x = 2 \Longrightarrow y = \frac{- 9}{2} = - 4,5\]
\[x = 6 \Longrightarrow y = \frac{- 9}{6} = - 1,5\]