\[1)\ y > 0:\]
\[- 6x + 3 > 0\]
\[- 6x > - 3\]
\[x < \frac{3}{6}\]
\[x < 0,5.\]
\[2)\ y < 0:\]
\[- 6x + 3 < 0\]
\[- 6x < - 3\]
\[x > \frac{3}{6}\]
\[x > 0,5.\]