Graph 
Table 
Characteristics
Vertex: \((0,0)\)
Axis of Symmetry: \(x = 0\)
Increasing: \(x\geq 0\); Decreasing \(-∞< x<0\)
Domain: \(-∞< x< ∞\) Range: \(y\geq0\)
Rewrite as a piecewise function:
\(f(x)=\begin{cases} \phantom{-}x; \quad x\geq0 \\ -x; \quad x<0\end{cases}\)
Lets take a closer look at parent functions:
