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

Answer: Option B

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