\[y = kx + b\]
\[A( - 2; - 1):\]
\[- 1 = - 2k + b\]
\[b = 2k - 1.\]
\[B(1;1):\]
\[1 = k + b\]
\[b = 1 - k.\]
\[2k - 1 = 1 - k\]
\[3k = 2\]
\[k = \frac{2}{3}.\]
\[b = 2k - 1 = 2 \cdot \frac{2}{3} - 1 = \frac{4}{3} - 1 = \frac{1}{3}.\]
\[Уравнение\ прямой:\ \]
\[y = \frac{2}{3}x + \frac{1}{3}.\]
\[Пересечение\ с\ осью\ OX:\]
\[\frac{2}{3}x = - \frac{1}{3}\]
\[x = - \frac{1}{3} \cdot \frac{3}{2} = - \frac{1}{2}.\]
\[Пересечение\ с\ OY:\]
\[y = \frac{1}{3}.\]
\[S = \frac{1}{2} \cdot \frac{1}{2} \cdot \frac{1}{3} = \frac{1}{12}.\]