document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=66081>Question 66081</A>: <I><SPAN STYLE=\"word-break: break-all;\"> This one is beyond me:<BR>\n" );
document.write( "Determine which two equations represent perpendicular lines:<BR>\n" );
document.write( "a)y=5/3x-4<BR>\n" );
document.write( "b)y=4x-5/3<BR>\n" );
document.write( "c)y=-1/4x+5/3<BR>\n" );
document.write( "d)y=1/4x-5/3<BR>\n" );
document.write( "If it is not too much to ask could you show me how you came to the answer please?<BR>\n" );
document.write( "Thanks,Brighid </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #46805 by </B><A HREF=/tutors/aboutme.mpl?userid=funmath><B>funmath(2933)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=funmath><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=46805\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Hi Brighid,<BR>\n" );
document.write( "Determine which two equations represent perpendicular lines:<BR>\n" );
document.write( "a)y=5/3x-4<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28b%29 ALIGN=MIDDLE  ALT=\"highlight%28b%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >y=4x-5/3<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28c%29 ALIGN=MIDDLE  ALT=\"highlight%28c%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >y=-1/4x+5/3<BR>\n" );
document.write( "d)y=1/4x-5/3<BR>\n" );
document.write( "This is how you know.  Perpendicular lines have slopes that are negative reciprocals.  (opposite signs and upside down)<BR>\n" );
document.write( "The slope intercept form of a line is: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28y=mx%2Bb%29 ALIGN=MIDDLE  ALT=\"highlight%28y=mx%2Bb%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >, where the slope is m and (0,b)=y-intercept.<BR>\n" );
document.write( "(b) has a slope of m=4=4/1<BR>\n" );
document.write( "(c) has a slope of m=-1/4<BR>\n" );
document.write( "The slopes have the opposite signs and are upside down form each other.<BR>\n" );
document.write( "Happy Calculating!!! </SPAN>\n" );
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