document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=249138>Question 249138</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Problem goes as follows:\r<BR>\n" );
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document.write( "\"Graph the line x=4\"\r<BR>\n" );
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document.write( "the answer provided is as follows:\r<BR>\n" );
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document.write( "(4,-5)(4,-1)(4,7).\r<BR>\n" );
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document.write( "I do not understand how this answer was discovered.  I am in dire need of your assistance.  Any help is immensely appreciated! Thank you.   </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #181507 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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=181507\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The points (4,-5)(4,-1)(4,7) have what in common? They have the value of 4 as the x coordinate. So we'll get a vertical line. \r<BR>\n" );
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document.write( "If you plot those points you get\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+drawing%28500%2C+500%2C+-10%2C+10%2C+-10%2C+10%2C%0D%0A+graph%28+500%2C+500%2C+-10%2C+10%2C+-10%2C+10%2C0%29%2C%0D%0A+circle%284%2C-5%2C0.05%29%2Ccircle%284%2C-5%2C0.08%29%2Ccircle%284%2C-5%2C0.10%29%2Ccircle%284%2C-5%2C0.12%29%2C%0D%0A+circle%284%2C-1%2C0.05%29%2Ccircle%284%2C-1%2C0.08%29%2Ccircle%284%2C-1%2C0.10%29%2Ccircle%284%2C-1%2C0.12%29%2C%0D%0A+circle%284%2C7%2C0.05%29%2Ccircle%284%2C7%2C0.08%29%2Ccircle%284%2C7%2C0.10%29%2Ccircle%284%2C7%2C0.12%29%0D%0A%0D%0A%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "and draw a straight line through them, you get\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+drawing%28500%2C+500%2C+-10%2C+10%2C+-10%2C+10%2C%0D%0A+graph%28+500%2C+500%2C+-10%2C+10%2C+-10%2C+10%2C0%29%2C%0D%0A+blue%28line%284%2C-20%2C4%2C20%29%29%2C%0D%0A+circle%284%2C-5%2C0.05%29%2Ccircle%284%2C-5%2C0.08%29%2Ccircle%284%2C-5%2C0.10%29%2Ccircle%284%2C-5%2C0.12%29%2C%0D%0A+circle%284%2C-1%2C0.05%29%2Ccircle%284%2C-1%2C0.08%29%2Ccircle%284%2C-1%2C0.10%29%2Ccircle%284%2C-1%2C0.12%29%2C%0D%0A+circle%284%2C7%2C0.05%29%2Ccircle%284%2C7%2C0.08%29%2Ccircle%284%2C7%2C0.10%29%2Ccircle%284%2C7%2C0.12%29%0D%0A%0D%0A%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "So the graph of <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=4 ALIGN=MIDDLE  ALT=\"x=4\"   DISABLED_style= \"max-width:90%; height:auto;\" > is the vertical blue line. Basically, the value of 'x' is fixed at 4 (ie it cannot be any other value), but y can be any value which gives us this vertical line. </SPAN>\n" );
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