I, II, III and IV

II, III and IV

I, III and IV

I, II and III

With the \(x\)-axis: \((0,0)\) and \((3,0)\); with the \(y\)-axis: \((0,-6)\).

With the \(x\)-axis: \((0,0)\) and \((4,0)\); with the \(y\)-axis: \((0,-6)\).

With the \(x\)-axis: \((1,0)\) and \((3,0)\); with the \(y\)-axis: \((0,-6)\).

With the \(x\)-axis: \((1,0)\) and \((3,0)\); with the \(y\)-axis: \((0,6)\).

\(x\in [2;+\infty)\)

\(x\in (-\infty;2]\)

\(x\in [1;3]\)

\(x\in (-\infty;+\infty)\)

\(y\in (-\infty;2)\)

\(y\in (-\infty;2]\)

\(y\in [2;+\infty)\)

\(y\in (2;+\infty)\)

Increasing on \(( -\infty;2)\), decreasing on \((2;+\infty)\).

Increasing on \(( -\infty;3)\), decreasing on \((3;+\infty)\).

Increasing on \(( -\infty;1)\), decreasing on \((1;+\infty)\).

Decreasing on \(( -\infty;2)\), increasing on \((2;+\infty)\).