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