document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=83955>Question 83955</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Demand equation. Helen’s Health food usually sells 400 cans of Propac Muscle Punch per week when the price is $5 per can. After experimenting with the weekly demand can be found by using the equation 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 more or less Muscle Punch if she raises her price from $5?<BR>\n" );
document.write( "b)	What happens to her sales every time she raises her price by $1?<BR>\n" );
document.write( "c)	Graph the equation<BR>\n" );
document.write( "d)	What is the maximum price that she can charge and still sell at least one can?<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #60421 by </B><A HREF=/tutors/aboutme.mpl?userid=Nate><B>Nate(3500)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Nate><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=60421\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 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 more or less Muscle Punch if she raises her price from $5?<BR>\n" );
document.write( "when p = 5 ~> d = 400<BR>\n" );
document.write( "when p + 1 = 6 ~> d = 360 Less<BR>\n" );
document.write( "b) What happens to her sales every time she raises her price by $1?<BR>\n" );
document.write( "p = 5 ~> d = 400<BR>\n" );
document.write( "p = 6 ~> d = 360 (-40)<BR>\n" );
document.write( "p = 7 ~> d = 320 (-40)<BR>\n" );
document.write( "Decreases 40 each time ...<BR>\n" );
document.write( "c) Graph the equation<BR>\n" );
document.write( "p is represented by the x-axis<BR>\n" );
document.write( "d is represented by the y-axis<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=graph%28300%2C300%2C-2%2C10%2C-50%2C800%2C600+-+40x%29 ALIGN=MIDDLE  ALT=\"graph%28300%2C300%2C-2%2C10%2C-50%2C800%2C600+-+40x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "d) What is the maximum price that she can charge and still sell at least one can?<BR>\n" );
document.write( "1 =< 600 - 40p<BR>\n" );
document.write( "-599 =< - 40p<BR>\n" );
document.write( "599 => 40p<BR>\n" );
document.write( "14.975 => p<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );