You can put this solution on YOUR website! Parallel lines have the same slope, so the slope of such a line is -4. The y-intercept doesn't matter, so we can write the equation in the form y = -4x + C, where C is any constant.
You can put this solution on YOUR website! P.S. (to the solution provided by another tutor)
The "C" can be any number except 7 If the "C" was 7 then you would have the same line, not a parallel line.