document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=398167>Question 398167</A>: <I><SPAN STYLE=\"word-break: break-all;\"> suppose a market research company finds that at a price of p=$20, they would sell x=42 tiles each month. if they lower the price to p=$10, then more people would purchase the tile, and they can expect to sell x=52 tiles in a months time. find the equation of the line for the demand equation. write your answer in the form p= mx+b. write an equation using two points in the form (x,p) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #282237 by </B><A HREF=/tutors/aboutme.mpl?userid=robertb><B>robertb(5830)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=robertb><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=robertb><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=282237\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Slope = (10 - 20)/(52 - 42) = -10/10 = -1.\r<BR>\n" );
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document.write( "Hence the equation of the line is p = -x + b.  To find b, use the point (42,20) (or (52,10)).\r<BR>\n" );
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document.write( "20 = -42 + b  ==> b = 62\r<BR>\n" );
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document.write( "Therefore the equation is p = -x + 62.  </SPAN>\n" );
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