document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1001927>Question 1001927</A>: <I><SPAN STYLE=\"word-break: break-all;\"> determine whether y=2 is a function </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #618978 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><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=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=618978\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> yes it is.\r<BR>\n" );
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document.write( "y = 2 is a horizontal line.\r<BR>\n" );
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document.write( "the value of y is equal to 2 regardless of what the value of x is.\r<BR>\n" );
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document.write( "however, each value of x yields one and only one value of y, therefore the equation is a function.\r<BR>\n" );
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document.write( "you can have multiple values of x for each value of y, but you cannot have multiple values of y for each value of x.\r<BR>\n" );
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document.write( "that's the definition of a funcftion.\r<BR>\n" );
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document.write( "only 1 value of y for each and every value of x.\r<BR>\n" );
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document.write( "graph the equation and give it the vertical line test and you'll see that each and every value of x yields only 1 value of  y.\r<BR>\n" );
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document.write( "here's the graph:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=graph%28600%2C600%2C-10%2C10%2C-5%2C5%2C2%29 ALIGN=MIDDLE  ALT=\"graph%28600%2C600%2C-10%2C10%2C-5%2C5%2C2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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