Example  1
Graph \(f\left( x \right) = \left| {x^2  + 2x - 3} \right|\).


Use a table of values to show points that lie on the graph. Plot these points to show where the function lies. Make sure to plot enough points to outline the entire shape of the function.

\(x\) \(\left| {x^2  + 2x - 3} \right|\)
\(-4\) \(5\)
\(-3\) \(0\)
\(-2\)\(3\)
\(-1\) \(4\)
\(0\) \(3\)
\(1\) \(0\)
\(2\)
 \(5\)