What is the slope of the line, parallel to the line 3x - 6y = 4?

$$\eqalign{ & 3x - 6y = 4 \cr & \Rightarrow 6y = 3x - 4 \cr & \Rightarrow y = \frac{{3x}}{6} - \frac{4}{6} \cr & \Rightarrow y = \frac{1}{2}x - \frac{2}{3} \cr & y = {m_1}x + c \cr & {\text{If lines are parallel then their slopes are equal}} \cr & \therefore {m_1} = {m_2} = \frac{1}{2} \cr} $$