the form of the linear equation is
with the given equation we have
where m=2, m is the slope of the line
if we have parallel lines the slope needs to be the same
so in order to find a linear equation parallel to y=2x+4
we use the slope m=2 and the point given (-1,6)
where (-1,6)=(x1,y1)
then
the equation of the line parallel to y=2x-4 is y=2x+8