Sketch a graph by completing the table and plotting the points. (See Examples 1–2.) $$k(x)=x$$ $$\begin{array}{|r|l|} \hline x & k(x) \\ \hline-2 & \\ \hline-1 & \\ \hline 0 & \\ \hline 1 & \\ \hline 2 & \\ \hline \end{array}$$
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