document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=82200>Question 82200</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Sorry for asking so many questions, but I really need to kow this one: how do I know wheter a relation is a function or not? <BR>\n" );
document.write( "and how am I supposed to graph this type of equation?   my work sheet says to \"graph each equation by plotting ordered pairs\" and then it gives me several equations such as this one:<BR>\n" );
document.write( " y = 2x - 1\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 #58883 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=58883\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> how do I know whether a relation is a function or not? <BR>\n" );
document.write( "A relation is a function if for each value x takes there is only one y value.<BR>\n" );
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document.write( "and how am I supposed to graph this type of equation?   my work sheet says to \"graph each equation by plotting ordered pairs\" and then it gives me several equations such as this one:<BR>\n" );
document.write( " y = 2x - 1<BR>\n" );
document.write( "To graph it you need two points:<BR>\n" );
document.write( "If x=0, y=2*0-1 = -1 giving you point (0,-1)<BR>\n" );
document.write( "If x=1, y=2*1-1 = 1 giving you point (1,1)<BR>\n" );
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document.write( "Plot these two points; draw a line thru them; that is your graph.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=graph%28400%2C300%2C-10%2C10%2C-10%2C10%2C2x-1%29 ALIGN=MIDDLE  ALT=\"graph%28400%2C300%2C-10%2C10%2C-10%2C10%2C2x-1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.\r<BR>\n" );
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