Let's solve the equation for y:
[tex]\begin{gathered} -3y=-6x-24 \\ y=\frac{-6x-24}{-3} \\ y=\frac{-6x}{-3}-\frac{24}{-3} \\ y=2x+8 \end{gathered}[/tex]Therefore we have:
[tex]y=2x+8[/tex]For this equation we have that the slope is 2 and the y-intercept is 8.