\[\boxed{\mathbf{1319\ (1319)}\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ x > 0;y > 0 \Longrightarrow І\]
\[2)\ x > 0;y < 0 \Longrightarrow \text{IV}\]
\[3)\ x < 0;y < 0 \Longrightarrow \text{III}\]
\[4)\ x < 0;y > 0 \Longrightarrow \text{II}\]