Practice problem

Interpret Absolute Value Functions as Piecewise

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\begin{align}&A)\;\;y=\left\{\begin{matrix} -x\,\,\,\,\text{if}\,\,\,\,x\geq0\\x\,\,\,\,\text{if}\,\,\,\,x<0\end{matrix}\right. \\ &B)\;\;y=\left\{\begin{matrix} x\,\,\,\,\text{if}\,\,\,\,x\geq4\\-x\,\,\,\,\text{if}\,\,\,\,x<4\end{matrix}\right. \\ &C)\;\;y=\left\{\begin{matrix} x+4\,\,\,\,\text{if}\,\,\,\,x-4\geq0\\x-4\,\,\,\,\text{if}\,\,\,\,x-4<0\end{matrix}\right. \\ &D)\;\;y=\left\{\begin{matrix} x+4\,\,\,\,\text{if}\,\,\,\,x+4\geq0\\-x-4\,\,\,\,\text{if}\,\,\,\,x+4<0\end{matrix}\right.\end{align}

What does the absolute value function $y=|x+4|$ look like as a piecewise function?