document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=175866>Question 175866</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Determine of the graphs of the 2 equations are perpendicular?<BR>\n" );
document.write( "y=7x-9<BR>\n" );
document.write( "2y=7-x </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #130971 by </B><A HREF=/tutors/aboutme.mpl?userid=nerdybill><B>nerdybill(7384)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nerdybill><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=nerdybill><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=130971\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> y=7x-9<BR>\n" );
document.write( "2y=7-x<BR>\n" );
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document.write( "First, convert both to \"slope-intercept\" form of<BR>\n" );
document.write( "y = mx + b<BR>\n" );
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document.write( "y=7x-9<BR>\n" );
document.write( "y=(-1/2)x + 7/2<BR>\n" );
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document.write( "Slope of equation 1 is 7<BR>\n" );
document.write( "Slope of equation 2 is -1/2<BR>\n" );
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document.write( "If the two lines are perpendicular, multiplying the two slopes together should equal -1.<BR>\n" );
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document.write( "7 * (-1/2) = -7/2<BR>\n" );
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document.write( "Since it does not, the two lines are NOT perpendicular. </SPAN>\n" );
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