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

\[y = - 8 \Longrightarrow x = \frac{- 9}{- 8} = 1\frac{1}{8}\]
\[y = - 2,4 \Longrightarrow x = \frac{- 9}{- 2,4} = 3,75\]
\[y = 2,4 \Longrightarrow x = \frac{- 9}{2,4} = - 3,75\]
\[y = 9 \Longrightarrow x = \frac{- 9}{9} = - 1\]