document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=828450>Question 828450</A>: <I><SPAN STYLE=\"word-break: break-all;\"> how do i do through:(1,-2),perp.to y = - 1/2 x -5 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #499336 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=499336\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> y = - 1/2x -5 has a slope of -1/2\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Flip the fraction:  -1/2 ----> -2/1 = -2\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Flip the sign: -2 ----> +2 = 2\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "So the perpendicular slope is m = 2\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "-------------------------------------------------------\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "y = mx + b\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "y = 2x + b ... plug in the perpendicular slope\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "-2 = 2(1) + b ... plug in the given point\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "-2 = 2 + b\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "-2 - 2 = b\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "-4 = b\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "b = -4\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "So we now know that m = 2 and b = -4. This means <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+mx%2Bb ALIGN=MIDDLE  ALT=\"y+=+mx%2Bb\"   DISABLED_style= \"max-width:90%; height:auto;\" > turns into <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+2x-4 ALIGN=MIDDLE  ALT=\"y+=+2x-4\"   DISABLED_style= \"max-width:90%; height:auto;\" > which is the final answer </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );