- ${\left( {y - 1} \right)^2} + {\left( {x + 2} \right)^2} = 16$
- $x - y - 3 = 0$
- ${\left( {y + 1} \right)^2} + {\left( {x + 2} \right)^2} = 4$
- ${\left( {y + 1} \right)^2} + {\left( {x + 2} \right)^2} = 16$