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

\[y > 0\ \ при\ \ x < 0\]
\[y < 0\ \ \ при\ \ \ x > 0.\]
\[y = - \frac{9}{x}\]
| \[x\] | \[- 1\] | \[1\] | \[- 3\] | \[3\] | \[9\] | \[- 9\] |
|---|---|---|---|---|---|---|
| \[y\] | \[9\] | \[- 9\] | \[3\] | \[- 3\] | \[- 1\] | \[1\] |

\[y > 0\ \ при\ \ x < 0\]
\[y < 0\ \ \ при\ \ \ x > 0.\]