document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=901779>Question 901779</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find an equation for the linear function g(x) which is perpendicular to the line 5 x - 4 y = 8 and intersects the line 5 x - 4 y = 8 at x = 20.<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #546950 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39617)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=546950\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The point of intersection is supposed to be x=20, and <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5%2A20-4y=8 ALIGN=MIDDLE  ALT=\"5%2A20-4y=8\"   DISABLED_style= \"max-width:90%; height:auto;\" >,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5%2A5-y=2 ALIGN=MIDDLE  ALT=\"5%2A5-y=2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=25-2=y ALIGN=MIDDLE  ALT=\"25-2=y\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=23 ALIGN=MIDDLE  ALT=\"y=23\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "The point (20,23).\r<BR>\n" );
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document.write( "The line perpendicular to that given line is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4x%2B5y=c ALIGN=MIDDLE  ALT=\"4x%2B5y=c\"   DISABLED_style= \"max-width:90%; height:auto;\" >, which choice uses knowledge of the standard form in which the equation is written.  Substituting the found point of intersection (the expected point of intersection) will give the value for c:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4%2A20%2B5%2A23=c ALIGN=MIDDLE  ALT=\"4%2A20%2B5%2A23=c\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%28c=135%29 ALIGN=MIDDLE  ALT=\"highlight_green%28c=135%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r<BR>\n" );
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document.write( "Now, the line being found, perpendicular to the given line at (20,23) is<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4x%2B5y=135 ALIGN=MIDDLE  ALT=\"4x%2B5y=135\"   DISABLED_style= \"max-width:90%; height:auto;\" >.<BR>\n" );
document.write( "Solve this for y, and THAT is your desired function, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=g%28x%29 ALIGN=MIDDLE  ALT=\"g%28x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5y=-4x%2B135 ALIGN=MIDDLE  ALT=\"5y=-4x%2B135\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28g%28x%29=y=-%284%2F5%29x%2B27%29 ALIGN=MIDDLE  ALT=\"highlight%28g%28x%29=y=-%284%2F5%29x%2B27%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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