document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=38277>Question 38277</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Helen's Health Foods usually sells 400 cans of ProPac Muscle Punch per week when the price is $5 per can. After experimenting with prices for some time, Helen has determined that the weekly demand can be found using the equation<BR>\n" );
document.write( "d=600 - 40p where d is the number of cans and p is the price per can.<BR>\n" );
document.write( "a) Will Helen sell mores or less Muscle Punch if she raises her prices from $5?<BR>\n" );
document.write( "b) What happens to her sales every time she raises her price by $1? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #23742 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=23742\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If you examine the demand equation<BR>\n" );
document.write( "d = 600 - 40p<BR>\n" );
document.write( "you see that the demand goes DOWN (she sells less punch) as p goes UP<BR>\n" );
document.write( "We can rewrite it as<BR>\n" );
document.write( "d = -40p + 600<BR>\n" );
document.write( "to put it into slope-intercept form.<BR>\n" );
document.write( "Here you can see the slope is -40.<BR>\n" );
document.write( "That means that for every increase of $1 in p, the demand goes down 40. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );