Question 108411
2x+4y=9
4y=-2x+9
y=-2x/4+9/4
y=-x/2+2.5 this line has a slope of -1/2 (red line)
any parallel line also has a slope of -1/2
-2=-1/2*6+b
-2=-3+b
b=-2+3
b=1 the y intercept of this line.
y=-x/2+1 (green line)
{{{ graph( 300, 200, -6, 5, -10, 10, y = -x/2 +2.5, y = -x/2 +1) }}} (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions y = -x/2 +2.5 and y = -x/2 +1).