document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=396271>Question 396271</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Line two is perpendicular to the line 2x-4y=20. What is the slope of the line?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #281159 by </B><A HREF=/tutors/aboutme.mpl?userid=blwinbbbles><B>blwinbbbles(106)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=blwinbbbles><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=blwinbbbles><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=281159\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> First put the equation into linear form of y = mx + b\r<BR>\n" );
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document.write( "so:<BR>\n" );
document.write( "2x - 4y = 20    subtract 2x from both sides<BR>\n" );
document.write( "-4y = -2x + 20  now divide by -4<BR>\n" );
document.write( "y = 1/2(x) - 5    so you now know the slope is 1/2  <BR>\n" );
document.write( "a line perpendicular has an inverse negative slope:\r<BR>\n" );
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document.write( "so if the slope were -1/2 the perpendicular line would have a slope of 2\r<BR>\n" );
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document.write( "In our case the slope is 1/2 so the P line would have a slope of -2\r<BR>\n" );
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document.write( "Hope this helps </SPAN>\n" );
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