this equation is in point-slope form.
where,
using this equation you can gather a point and the slope, which gives you enough information to draw a line. transform the equation to standard form to start.
the equation is now in standard form, we have a point, as well as the slope:
point: (0, -6)
slope: -2
plot (0,-6), then simply rise/run with the provided slope of -2, once you feel you have a comfortable amount of points - draw a line.