Question 297901
Parallel to y= 2x + 1 & through(0,4)
y=2x+1 has a slope=2. (red line) 
Thus any parallel line will also have a slope=2.
Y=mX+b where m=the slope & b= the Y intercept.
4=2*0+b
4=b ans. for the Y intercept.
Y=2x+4 is the parallel line equation that passes through (0,4) (green line).
{{{ graph( 300, 200, -6, 5, -10, 10, 2x +1, 2x +4) }}} (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions 2x +1 and 2x +4).