document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=70251>Question 70251</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Determine which two equations represent perpendicular lines.<BR>\n" );
document.write( "(a)  y =  x – 3<BR>\n" );
document.write( "(b)  y = 3x –  <BR>\n" );
document.write( "(c)  y =  x +  <BR>\n" );
document.write( "(d)  y =  x –  \r<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 #50089 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=50089\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> None of those equations are perpendicular that I can see, unless theres more info. Perpendicular lines are related by inversed and negated slopes. So if I have a slope of 3, the perpendicular slope is -1/3. If I have a slope of 1, then I have a slope of -1/1 or just -1. So maybe you wrote the wrong problem (it looks like 3 equations are incomplete), but none of these are perpendicular to any other line. </SPAN>\n" );
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