document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=492864>Question 492864</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 4. Suppose you have a cookie stand, and when you charge $3 per cookie box you sell 200 boxes. But when you raise your price to $4 you only sell 120 boxes. \r<BR>\n" );
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document.write( "a.   Write an equation for the number of boxes you sell as a function of the price you charge. \r<BR>\n" );
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document.write( "b.   Denote \"B\" for number of boxes, and \"P\" for the price you charge.\r<BR>\n" );
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document.write( "c.   Assume the function is linear..                </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #335201 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=335201\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Suppose you have a cookie stand, and when you charge $3 per cookie box you sell 200 boxes. But when you raise your price to $4 you only sell 120 boxes.<BR>\n" );
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document.write( "You have two points: (3,200) and (4,120)<BR>\n" );
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document.write( "a. Write an equation for the number of boxes you sell as a function of the price you charge.<BR>\n" );
document.write( "slope = (200-120)/(3-4) = -80<BR>\n" );
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document.write( "Form: # of boxes = mp + b<BR>\n" );
document.write( "Solve for 200 = -80*3 + b<BR>\n" );
document.write( "b = 440<BR>\n" );
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document.write( "Equation:<BR>\n" );
document.write( "# of boxes = -80(charge) + 440\r<BR>\n" );
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document.write( "b. Denote \"B\" for number of boxes, and \"P\" for the price you charge.<BR>\n" );
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document.write( "c. Assume the function is linear..<BR>\n" );
document.write( "B = -80*P + 440<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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