document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=478318>Question 478318</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help? I don;t understand the process of this. \r<BR>\n" );
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document.write( "The following problem can be modeled with a linear equation. Analyze the problem and identify what quantities the variables x and y represent. The information provided in the problem is adequate to determine a point and a slope or two points on the line.\r<BR>\n" );
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document.write( "Robinson Wholesale Company paid $1380 for 500 items. Later they bought 800 items for $1710. Assume that the cost is a linear function of the number of items. Write the equation. (Let y represent the amount paid and x represent the number of items purchased.)\r<BR>\n" );
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document.write( "The answer is y = 1.1x + 830 I don't have a clue how to get this though. \r<BR>\n" );
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document.write( "???<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 #327751 by </B><A HREF=/tutors/aboutme.mpl?userid=scott8148><B>scott8148(6628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=scott8148><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=scott8148><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=327751\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> they got 300 more items (800 - 500) for 330 more $ (1710 - 1380)<BR>\n" );
document.write( "___ this is a cost of $1.1 per item (330 / 300) ___ this piece price is the slope of the line\r<BR>\n" );
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document.write( "using either order, you can subtract the piece price and find the fixed costs<BR>\n" );
document.write( "___ $830 for set up charges, delivery, etc. ___ this is the y-intercept of the line </SPAN>\n" );
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