document.write( "Question 257309: In each case determine whether the lines are parallel,
\n" ); document.write( "perpendicular, or neither.\r
\n" ); document.write( "\n" ); document.write( "y=x+7
\n" ); document.write( "y=-x+2
\n" ); document.write( "
\n" ); document.write( "

Algebra.Com's Answer #189224 by richwmiller(17219)\"\" \"About 
You can put this solution on YOUR website!
Each of these has a slope of 1 and -1 and are therefore perpendicular.
\n" ); document.write( "
\n" ); document.write( "
\n" );