\[y = \left\{ \begin{matrix} - (x + 4)^{2},\ \ \ - 5 \leq x \leq - 2\ \ (1) \\ 2x,\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ - 2 < x < 2\ \ (2) \\ (x - 4)^{2},\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 2 \leq x \leq 5\ \ (3) \\ \end{matrix} \right.\ \]
\[1)\ y = - (x + 4)^{2}\]
| \[x\] | \[- 5\] | \[- 4\] | \[- 3\] | \[- 2\] |
|---|---|---|---|---|
| \[y\] | \[- 1\] | \[0\] | \[- 1\] | \[- 4\] |
\[2)\ y = 2x\]
| \[x\] | \[- 1\] | \[0\] | \[1\] |
|---|---|---|---|
| \[y\] | \[- 2\] | \[0\] | \[2\] |
\[3)\ y = (x - 4)^{2}\]
| \[x\] | \[2\] | \[3\] | \[4\] | \[5\] |
|---|---|---|---|---|
| \[y\] | \[4\] | \[1\] | \[0\] | \[1\] |
