\[y = \left\{ \begin{matrix} 3x + 9,\ \ \ \ \ \ \ - 4 \leq x < - 2\ \ (1) \\ x^{2} - 1,\ \ \ \ \ \ \ \ \ \ - \ 2 \leq x \leq 2\ \ (2) \\ - 3x + 9,\ \ \ \ \ \ \ \ \ \ \ \ \ 2 < x \leq 4\ \ (3) \\ \end{matrix} \right.\ \]
\[1)\ y = 3x + 9\]
\[x\] | \[- 4\] | \[- 3\] |
---|---|---|
\[y\] | \[- 3\] | \[0\] |
\[2)\ y = x² - 1\]
\[x\] | \[- 2\] | \[- 1\] | \[0\] | \[1\] | \[2\] |
---|---|---|---|---|---|
\[y\] | \[3\] | \[0\] | \[- 1\] | \[0\] | \[3\] |
\[3)\ y = - 3x + 9\]
\[x\] | \[3\] | \[4\] |
---|---|---|
\[y\] | \[0\] | \[- 3\] |