document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=231277>Question 231277</A>: <I><SPAN STYLE=\"word-break: break-all;\"> determine whether the graphs of each pair of equations are parallel, perpendicular, or neither. y= 5x-4 and y= -5x+4<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #171197 by </B><A HREF=/tutors/aboutme.mpl?userid=texttutoring><B>texttutoring(324)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=texttutoring><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=texttutoring><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=171197\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> They are not parallel, because one is positive and the other is negative.\r<BR>\n" );
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document.write( "They are not perpendicular, because perpendicular lines have slopes which are negative reciprocals of each other. (i.e. 5/1 and -1/5 are negative reciprocals)\r<BR>\n" );
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document.write( "Therefore, those 2 lines are neither parallel nor perpendicular. </SPAN>\n" );
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