\[y = kx + b\]
\[A(1;\ - 1):\]
\[- 1 = k + b\]
\[b = - k - 1.\]
\[B( - 3;2):\]
\[2 = - 3k + b\]
\[b = 3k + 2.\]
\[3k + 2 = - k - 1\]
\[4k = - 3\]
\[k = - \frac{3}{4} = - 0,75.\]
\[b = - k - 1 = 0,75 - 1 = - 0,25.\]
\[Уравнение\ прямой:\ \]
\[y = - 0,75x - 0,25.\]
\[Пересечение\ с\ OX:\]
\[- 0,75x = 0,25\]
\[x = - \frac{25}{75} = - \frac{1}{3}.\]
\[Пересечение\ с\ OY:\]
\[y = - 0,25 = - \frac{1}{4}.\]
\[S = \frac{1}{2} \cdot \frac{1}{3} \cdot \frac{1}{4} = \frac{1}{24}.\]