document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=6348>Question 6348</A>: <I><SPAN STYLE=\"word-break: break-all;\"> please help me solve this.<BR>\n" );
document.write( "write an equation of a line given (x1,y1)=(12,7) and (x2,y2)=(-4,5)\r<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 #3404 by </B><A HREF=/tutors/aboutme.mpl?userid=AnlytcPhil><B>AnlytcPhil(1810)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=AnlytcPhil><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=AnlytcPhil><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=3404\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> write an equation of a line given (x1,y1)=(12,7) and (x2,y2)=(-4,5)\r<BR>\n" );
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document.write( "   <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=m+=+%28y2-y1%29%2F%28x2-x1%29 ALIGN=MIDDLE  ALT=\"m+=+%28y2-y1%29%2F%28x2-x1%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=m+=+%285-7%29%2F%28-4-12%29 ALIGN=MIDDLE  ALT=\"m+=+%285-7%29%2F%28-4-12%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=m+=+%28-2%29%2F%28-16%29 ALIGN=MIDDLE  ALT=\"m+=+%28-2%29%2F%28-16%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=m+=+1%2F8 ALIGN=MIDDLE  ALT=\"m+=+1%2F8\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Now use\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y-y1+=+m%28x-x1%29 ALIGN=MIDDLE  ALT=\"y-y1+=+m%28x-x1%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=y-7+=+%281%2F8%29%28x-12%29 ALIGN=MIDDLE  ALT=\"y-7+=+%281%2F8%29%28x-12%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=y-7+=+%281%2F8%29x-3%2F2 ALIGN=MIDDLE  ALT=\"y-7+=+%281%2F8%29x-3%2F2\"   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=y+=+%281%2F8%29x-3%2F2+%2B+7 ALIGN=MIDDLE  ALT=\"y+=+%281%2F8%29x-3%2F2+%2B+7\"   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=y+=+%281%2F8%29x-3%2F2+%2B+14%2F2 ALIGN=MIDDLE  ALT=\"y+=+%281%2F8%29x-3%2F2+%2B+14%2F2\"   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=y+=+%281%2F8%29x%2B+11%2F2 ALIGN=MIDDLE  ALT=\"y+=+%281%2F8%29x%2B+11%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "That will do as a final answer if you only want the slope-intercept<BR>\n" );
document.write( "form, or,<BR>\n" );
document.write( "you can multiply through by 8 and get rid of fractions\r<BR>\n" );
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document.write( "  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=8y+=+x+%2B+44 ALIGN=MIDDLE  ALT=\"8y+=+x+%2B+44\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "and to get it in standard form Ax + By = C\r<BR>\n" );
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document.write( "  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-x+%2B+8y+=+44 ALIGN=MIDDLE  ALT=\"-x+%2B+8y+=+44\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "and since the standard form requires that A be positive,<BR>\n" );
document.write( "we multiply thru by -1\r<BR>\n" );
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document.write( "  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+-+8y+=+-44 ALIGN=MIDDLE  ALT=\"x+-+8y+=+-44\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Edwin\r<BR>\n" );
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