Вопрос:

Ответ:

\[y = \frac{1}{2}x - 2\]

\[x\] \[0\] \[2\]
\[y\] \[- 2\] \[- 1\]

\[y \leq 0\ \ при\]

\[x \in ( - \infty;4\rbrack.\]