\n" );
document.write( "y=3x+7 \n" );
document.write( "y=3x-9 \n" );
document.write( "y=3x+2 \n" );
document.write( "y=3x-2 \n" );
document.write( "y=3x+5 \n" );
document.write( "y=3x-8\r \n" );
document.write( "\n" );
document.write( "All of those are parallel to y=3x+1, \n" );
document.write( "or any other line of the form y=3x+b, and you can \n" );
document.write( "pick any number for b. They all have the same slope. \n" );
document.write( "And when lines slope the same way (have the same slope) \n" );
document.write( "they are parallel.\r \n" );
document.write( "\n" );
document.write( "Edwin