document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1142667>Question 1142667</A>: <I><SPAN STYLE=\"word-break: break-all;\"> There was a question on a certification test that read:<BR>\n" );
document.write( "\"Which graph best represents this system of equations?\"\r<BR>\n" );
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document.write( "x + y = 10<BR>\n" );
document.write( "x - y = 4\r<BR>\n" );
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document.write( "My answer was (x =7, y = 3)<BR>\n" );
document.write( "When I saw the different linear graphs, I did not know which one to select because only the coordinate points (7,3) satisfy the equation. Each line of the graph went through (7,3), but in different directions. How do I find other coordinate points that is a solution to this equation? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #763374 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=763374\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Select the one showing intersection at (7,3) and using the slope for each of the lines for your equations.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2By=10 ALIGN=MIDDLE  ALT=\"x%2By=10\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=-x%2B10 ALIGN=MIDDLE  ALT=\"y=-x%2B10\"   DISABLED_style= \"max-width:90%; height:auto;\" >------------slope-intercept form for your first equation.  Slope <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-1 ALIGN=MIDDLE  ALT=\"-1\"   DISABLED_style= \"max-width:90%; height:auto;\" > and vertical axis intercept 10\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x-y=4 ALIGN=MIDDLE  ALT=\"x-y=4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-y=-x%2B4 ALIGN=MIDDLE  ALT=\"-y=-x%2B4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=x-4 ALIGN=MIDDLE  ALT=\"y=x-4\"   DISABLED_style= \"max-width:90%; height:auto;\" >------------slope-intercept form for your second equation.  Slope <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1 ALIGN=MIDDLE  ALT=\"1\"   DISABLED_style= \"max-width:90%; height:auto;\" > and vertical axis intercept at <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-4 ALIGN=MIDDLE  ALT=\"-4\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r<BR>\n" );
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document.write( "Choose the picture which corresponds to this:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=graph%28400%2C400%2C-3%2C9%2C-6%2C6%2C-x%2B10%2Cx-4%29 ALIGN=MIDDLE  ALT=\"graph%28400%2C400%2C-3%2C9%2C-6%2C6%2C-x%2B10%2Cx-4%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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