document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1015712>Question 1015712</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hi,<BR>\n" );
document.write( "Can you help me with the following problem? I don't understand how I'd set the equation up. Li Teng is ordering graduation announcements for the senior class. If 100 announcements are ordered, the cost is $225. The cost for 175 announcements is $375, and 200 announcements cost $425. Write an equation to describe this relationship and use it to find the cost of 250 announcements.<BR>\n" );
document.write( "Thanks! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #632086 by </B><A HREF=/tutors/aboutme.mpl?userid=FrankM><B>FrankM(1040)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=FrankM><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=FrankM><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=632086\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 100 cost $225<BR>\n" );
document.write( "175 cost $375<BR>\n" );
document.write( "200 cost $425\r<BR>\n" );
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document.write( "First, since cost for 200 is not twice the cost for 100, there's more going on. \r<BR>\n" );
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document.write( "The 75 from 100-175 are $150 extra or $2 each<BR>\n" );
document.write( "The 25 from 175-200 are $50 extra or $2 each\r<BR>\n" );
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document.write( "From this we see that we have a linear equation but not \"Direct Variation\".  DV is when Y=MX, with an intercept at 0. In this case we need to get the Y intercept, which effectively describes a setup fee. The cost before we actually buy the first card. \r<BR>\n" );
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document.write( "We already know cards cost $2 each. Since 100 cost $225, it's a $25 fee\r<BR>\n" );
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document.write( "So the equation is Cost = $25 + $2per card. \r<BR>\n" );
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document.write( "250 cards will cost $525.  </SPAN>\n" );
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