document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=939288>Question 939288</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Line m contains (6,8) and (-1,2). Line n contains (-1,5) and (5,y). What is the value of y if line m is perpendicular to line n? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #572488 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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=572488\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Line m contains (6,8) and (-1,2). Line n contains (-1,5) and (5,y). What is the value of y if line m is perpendicular to line n?<BR>\n" );
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document.write( "slope=(y1-y2)/(x1-x2)<BR>\n" );
document.write( "Slope of line m=(6+1)/(8-2)=7/6<BR>\n" );
document.write( "Slope of line n=(y-5)/(5+1)=(y-5)/6<BR>\n" );
document.write( "Slope of line n=-6/7 (negative reciprocal of slope m)<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28y-5%29%2F6=-6%2F7 ALIGN=MIDDLE  ALT=\"%28y-5%29%2F6=-6%2F7\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "7(y-5)=-36<BR>\n" );
document.write( "7y-35=-36<BR>\n" );
document.write( "7y=-1<BR>\n" );
document.write( "y=-1/7 </SPAN>\n" );
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