document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=676458>Question 676458</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the slope of a line perpendicular to the line through the points (2,4) and (-12,8) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #420357 by </B><A HREF=/tutors/aboutme.mpl?userid=khurshidi><B>khurshidi(7)</B></A><img src=\"/images/stars/stars-05.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=khurshidi><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=khurshidi><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=420357\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Find the slope of a line perpendicular to the line through the points (2,4) and (-12,8)\r<BR>\n" );
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document.write( "Solution:\r<BR>\n" );
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document.write( "Two points given are<BR>\n" );
document.write( "P = (2, 4) = (x1, y1)<BR>\n" );
document.write( "Q = (-12, 8) = (x2, y2)\r<BR>\n" );
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document.write( "Slope of the line PQ<BR>\n" );
document.write( "m1 = y2-y1/x2-x1 = 8 - 4/-12 - 2 = 4/-14 = -2/7\r<BR>\n" );
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document.write( "There fore\r<BR>\n" );
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document.write( "m1 = -2/7\r<BR>\n" );
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document.write( "The slope of the line perpendicular to the given line PQ will be the negative reciprocal of the slope of the line PQ\r<BR>\n" );
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document.write( "i.e.\r<BR>\n" );
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document.write( "m2 = -1/m1 <BR>\n" );
document.write( "(m2 is the slope of the line perpendicular to the slope of the given line PQ)\r<BR>\n" );
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document.write( "m2 = -1/-2/7\r<BR>\n" );
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document.write( "or\r<BR>\n" );
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document.write( "m2 = 7/2\r<BR>\n" );
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document.write( "This is the required slope of the line perpendicular to the line through the points (2, 4) and (-12, 8).\r<BR>\n" );
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document.write( "Hope the answer your question\r<BR>\n" );
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document.write( "Regards,\r<BR>\n" );
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document.write( "Khurshidi<BR>\n" );
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