document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=970432>Question 970432</A>: <I><SPAN STYLE=\"word-break: break-all;\"> What is the equation of the line that is perpendicular to -x + y = 7 and passes through (-1, -1)?\r<BR>\n" );
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document.write( "a)-x + y = 2\r<BR>\n" );
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document.write( "b)-x – y = 2\r<BR>\n" );
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document.write( "c)x – y = 2\r<BR>\n" );
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document.write( "d)-x – y = 0\r<BR>\n" );
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document.write( "e)x + y = 0 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #593048 by </B><A HREF=/tutors/aboutme.mpl?userid=rothauserc><B>rothauserc(4718)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rothauserc><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=rothauserc><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=593048\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> -x + y = 7<BR>\n" );
document.write( "standard slope - intercept form for this equation is<BR>\n" );
document.write( "y = x + 7<BR>\n" );
document.write( "slope is 1 and the slope of the line perpendicular is -1 (negative reciprocal)<BR>\n" );
document.write( "so far we have<BR>\n" );
document.write( "y = -x + b<BR>\n" );
document.write( "now use the point (-1, -1)<BR>\n" );
document.write( "-1 = -(-1) + b<BR>\n" );
document.write( "-1 = 1 + b<BR>\n" );
document.write( "b = -2<BR>\n" );
document.write( "y = -x - 2<BR>\n" );
document.write( "add x to both sides of =<BR>\n" );
document.write( "x + y = -2<BR>\n" );
document.write( "multiply both sides of = by -1<BR>\n" );
document.write( "-x -y = 2<BR>\n" );
document.write( "answer is b<BR>\n" );
document.write( " </SPAN>\n" );
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