\[y = - 0,38x - 19\]
\[D(y) = R;\ \ E(y) = R.\]
\[y = 0:\]
\[- 0,38x - 19 = 0\]
\[- 0,38x = 19\]
\[x = 19\ :( - 0,38) = - 1900\ :38\]
\[x = - 50.\]
\[y > 0\ \ при\ x > - 50;\ \ \]
\[y < 0\ \ при\ x < - 50.\]
\[Функция\ убывает.\]