Hi,
the standard slope-intercept form for an equation of a line is 
  where m is the slope and b the y-intercept.
find the equation of a line that contains the point (-4,2) 
and is parallel to the line 3x + 4y=4
First: find slope of 3x + 4y=4 :    y =  , (Green Line)
, (Green Line)
New line parallel to that line(same slope):
 y =  ,    |Using P(-4,2) to solve for b
,    |Using P(-4,2) to solve for b
 2 = (-3/4)(-4) + b
 2 - 3 = b
-1= b
 y =  Blue Line
 Blue Line
 