document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=999588>Question 999588</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The figure below shows how the price of Amazon's Kindle has decreased over time. The green line is a trend line. (You can check that the hash marks on the horizontal axis are one-month intervals.) \r<BR>\n" );
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document.write( "http://www.webassign.net/craudql2/3-1-022.png\r<BR>\n" );
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document.write( "The trend line estimates that the price was $432 in November 2007 and $80 in September 2011. (That is an interval of 46 months.) Use the slope of the trend line to determine by how much the price of a Kindle should decrease every six months. (Round your answer to two decimal places.)  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #617211 by </B><A HREF=/tutors/aboutme.mpl?userid=fractalier><B>fractalier(6550)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=fractalier><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=fractalier><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=617211\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Well, you don't need the picture because the decrease in y (the price) is<BR>\n" );
document.write( "$432 - $80 = $352<BR>\n" );
document.write( "in 46 months (the change in x)...<BR>\n" );
document.write( "so the slope is<BR>\n" );
document.write( "-$352/46 months = -$7.65/month<BR>\n" );
document.write( "so for six months, the change in price is six times that or<BR>\n" );
document.write( "6(-7.65)=-$45.90 </SPAN>\n" );
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