First, make it so that the form of the equation is in slope-intercept form. Do this by subtracting #y# by both sides, and then add #2# to both sides. Then you have to multiply both sides by #-1# to make #y# positive. All this will get you:
#y=-4x-2
Since #b# is the y-intercept (where the line crosses the y-axis), plot the point #(0,-2)# on the graph. 3
The coefficient of #x# is the slope of the line, which in this case is #-4#. This means that the line will decrease 4 units of y for every 1 unit gain of x.
Start at your point of #(0,-2)# and go down 4 units to #(0,-6)#.
Then go 1 unit to the right and get to #(1,-6)#. Plot the point and connect the dots to make the line.