\[D\left( - 0,5;4\frac{2}{3} \right) \Longrightarrow\]
\[\Longrightarrow принадлежит,\ т.к.\]
\[- 4x - 3y + 12 = 0\]
\[- 3y = 4x - 12\ \ \ \ \ |\ :( - 3)\]
\[y = 4 - \frac{4}{3}\text{x.}\]
\[y( - 0,5) = 4 - \frac{4}{3} \cdot ( - 0,5) =\]
\[= 4 + \frac{4}{3} \cdot \frac{1}{2} = 4 + \frac{4}{6} = 4\frac{4}{6} = 4\frac{2}{3}.\]