document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=121003>Question 121003</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Can you please which two of these equation represent perpendicular lines: <BR>\n" );
document.write( "(a) y = 4/7x - 3 (b) y = 3x - 4/7 (c) y = -1/3x + 4/7 (d) y = 1/3x - 4/7?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #88799 by </B><A HREF=/tutors/aboutme.mpl?userid=rapaljer><B>rapaljer(4671)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rapaljer><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=rapaljer><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=88799\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Lines that are perpendicular have slopes that are NEGATIVE RECIPROCALS of one another.  The slope of a line in slope-intercept form is always the coefficient of x.  Therefore the slopes of the given lines are \r<BR>\n" );
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document.write( "a) 4/7<BR>\n" );
document.write( "b) 3<BR>\n" );
document.write( "c) -1/3<BR>\n" );
document.write( "d) 1/3\r<BR>\n" );
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document.write( "Of these numbers the slopes 3 and -1/3 are negative reciprocals, so the answer is b and c.\r<BR>\n" );
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document.write( "R^2 </SPAN>\n" );
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