\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
For the function \(f(x) = \dfrac{x^2}{2} - 2x - 1\), sketch the graph of \(f\).(You may fill in a table of values for \(x = -2, -1, 0, 1, 2, 3, 4\).)

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