Question 155614
Y=mX+b (m=slope).
5y+8x+4=10+8x  
5y=-4+10-8x+8x
5y=6
y=6/5 slope=0.
{{{ graph( 300, 200, -6, 5, -10, 10, y =6/5) }}} (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, y =6/5).