You need to first convert this to slope-intercept form. (y=mx+b)
Solve for y by subtracting 2x from each side
-4y = -2x + 6
Divide by -4
y = 2/4x + 6/-4
This can be reduced to
y= 1/2x + 3/-2
In y=mx + b
m = the slope of the line
b = the y intercept of the line
slope = 1/2
y intercept = 3/-2