document.write( "Question 160260: can someone please help me with this problem:\r
\n" ); document.write( "\n" ); document.write( "Two lines are parallel if:\r
\n" ); document.write( "\n" ); document.write( "a. m1 =(-m2)^-1
\n" ); document.write( "b. m1 = -m2
\n" ); document.write( "c. m1 = m2
\n" ); document.write( "d. None of the above
\n" ); document.write( "

Algebra.Com's Answer #118220 by nerdybill(7384)\"\" \"About 
You can put this solution on YOUR website!
Two lines are parallel if the slopes of both lines are the same.
\n" ); document.write( ".
\n" ); document.write( "So, if m1 represents the slope of the first line
\n" ); document.write( "and m2 represents the slope of the second line
\n" ); document.write( "then
\n" ); document.write( "m1 should equal m2
\n" ); document.write( ".
\n" ); document.write( "Solution: c
\n" ); document.write( "
\n" );