\[y = \frac{k}{x - x_{0}} + y_{0};\ \ \ x_{0} = - 2;\ \ \]
\[y_{0} = - 1\]
\[y = \frac{k}{x + 2} - 1;\ \ \ \ \ ( - 5;0):\]
\[0 = \frac{k}{- 5 + 2} - 1\]
\[\frac{k}{- 3} = 1\]
\[k = - 3.\]
\[Ответ:x_{0} = - 2;\ \ y_{0} = - 1;\ \ \]
\[k = - 3.\]