document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=920424>Question 920424</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A can sell 20 books per day at Rs 25 per book but he can sell 30 books if he charges Rs 20 per book. Determine the demand function assuming it linear  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #558349 by </B><A HREF=/tutors/aboutme.mpl?userid=ewatrrr><B>ewatrrr(24785)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ewatrrr><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=ewatrrr><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=558349\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "(30, 20)<BR>\n" );
document.write( "(20, 25 ) m =<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28y%5B1%5D+-+y%5B2%5D%29%2F%28x%5B1%5D+-+x%5B2%5D+%29 ALIGN=MIDDLE  ALT=\"%28y%5B1%5D+-+y%5B2%5D%29%2F%28x%5B1%5D+-+x%5B2%5D+%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >= -5/10 = -2<BR>\n" );
document.write( "***Using point-slope form, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+-+y%5B1%5D+=+m%28x+-+x%5B1%5D%29 ALIGN=MIDDLE  ALT=\"y+-+y%5B1%5D+=+m%28x+-+x%5B1%5D%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > P(20,25)<BR>\n" );
document.write( "y - 25 = -2(x-20)<BR>\n" );
document.write( "y = -2x +65<BR>\n" );
document.write( "p(x) = -2x + 65 is the Demand Function<BR>\n" );
document.write( " </SPAN>\n" );
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