document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=118011>Question 118011</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Pen and pencils.<BR>\n" );
document.write( "a bookstore manager plans to spend $60 on pens at 30 cents each and pencils at 10 cents each. The equation 0.10x+0.30y=60 can be used to model this situation.\r<BR>\n" );
document.write( "\n" );
document.write( "a) who x and y represent?\r<BR>\n" );
document.write( "\n" );
document.write( "b) graph the equation.\r<BR>\n" );
document.write( "\n" );
document.write( "c) write the equation in slope-intercept form.\r<BR>\n" );
document.write( "\n" );
document.write( "d) what is the slope of the line?\r<BR>\n" );
document.write( "\n" );
document.write( "e) what does the slope tell you?\r<BR>\n" );
document.write( "\n" );
document.write( "the answer  i got was<BR>\n" );
document.write( "a) x= # of pencils y= # of pens<BR>\n" );
document.write( "this is what I got so far </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #86060 by </B><A HREF=/tutors/aboutme.mpl?userid=MathLover1><B>MathLover1(20850)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=MathLover1><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=MathLover1><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=86060\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The equation <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%280.10%29x+%2B+%280.30%29y+=+60 ALIGN=MIDDLE  ALT=\"%280.10%29x+%2B+%280.30%29y+=+60\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "\n" );
document.write( "pens at <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=30 ALIGN=MIDDLE  ALT=\"30\"   DISABLED_style= \"max-width:90%; height:auto;\" > cents = > $<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.30 ALIGN=MIDDLE  ALT=\"0.30\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "pencils at <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=10 ALIGN=MIDDLE  ALT=\"10\"   DISABLED_style= \"max-width:90%; height:auto;\" > cents = > $<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.10 ALIGN=MIDDLE  ALT=\"0.10\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "\n" );
document.write( "a) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x ALIGN=MIDDLE  ALT=\"x\"   DISABLED_style= \"max-width:90%; height:auto;\" > represents pencils  and <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+ ALIGN=MIDDLE  ALT=\"y+\"   DISABLED_style= \"max-width:90%; height:auto;\" >represents  pens \r<BR>\n" );
document.write( "\n" );
document.write( "b) graph the equation. \r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "<TABLE  BORDER=1>\n" );
document.write( "\n" );
document.write( " <TR><TD  ALIGN=MIDDLE>Solved by <A  rel=nofollow HREF=http://wiki.algebra.com/index.php/Tutoring_-_pluggable_solvers>pluggable</A> solver: <A  rel=nofollow HREF=Plot_a_graph_of_functions.solver>PLOT a graph of a function</A></TD></TR>\n" );
document.write( "<TR><TD  ALIGN=LEFT>Plotting a graph:<BR><IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=graph%28+600%2C+400%2C+-100%2C+300%2C+-6%2C+250%2C+-%280.33%29x%2B200+%29 ALIGN=MIDDLE  ALT=\"graph%28+600%2C+400%2C+-100%2C+300%2C+-6%2C+250%2C+-%280.33%29x%2B200+%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "\n" );
document.write( "  This solver uses <A  rel=nofollow HREF=/services/rendering/>formula rendering system</A> and here's the actual formula that was plotted:<BR>\n" );
document.write( "  <BR>\n" );
document.write( "  graph( 600, 400, -100, 300, -6, 250, -(0.33)x+200 )<BR>\n" );
document.write( "  <BR>\n" );
document.write( "  </TD></TR>\n" );
document.write( "</TABLE><BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "c) write the equation in slope-intercept form. \r<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%280.10%29x+%2B+%280.30%29y+=+60 ALIGN=MIDDLE  ALT=\"%280.10%29x+%2B+%280.30%29y+=+60\"   DISABLED_style= \"max-width:90%; height:auto;\" >….move <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%280.10%29x ALIGN=MIDDLE  ALT=\"%280.10%29x\"   DISABLED_style= \"max-width:90%; height:auto;\" > to the right\r<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%280.30%29y+=++-+%280.10%29x+%2B+60+ ALIGN=MIDDLE  ALT=\"+%280.30%29y+=++-+%280.10%29x+%2B+60+\"   DISABLED_style= \"max-width:90%; height:auto;\" >…..divide both sides by <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.30 ALIGN=MIDDLE  ALT=\"0.30\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "	<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+y+=+-+%280.10%29x%2F%280.30%29+%2B+60%2F%280.30%29+ ALIGN=MIDDLE  ALT=\"+y+=+-+%280.10%29x%2F%280.30%29+%2B+60%2F%280.30%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+y+=+-+%280.33%29x+%2B+200%29+ ALIGN=MIDDLE  ALT=\"+y+=+-+%280.33%29x+%2B+200%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" >………………..the<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+slope-intercept ALIGN=MIDDLE  ALT=\"+slope-intercept\"   DISABLED_style= \"max-width:90%; height:auto;\" > form\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "d) the slope of the line is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-+%280.33%29 ALIGN=MIDDLE  ALT=\"-+%280.33%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "\n" );
document.write( "e) the slope tell you the <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=steepness ALIGN=MIDDLE  ALT=\"steepness\"   DISABLED_style= \"max-width:90%; height:auto;\" > of a line, or slope is also defined as <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=rise+%2F+run ALIGN=MIDDLE  ALT=\"rise+%2F+run\"   DISABLED_style= \"max-width:90%; height:auto;\" > ;\r<BR>\n" );
document.write( "\n" );
document.write( "if the line<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+rises ALIGN=MIDDLE  ALT=\"+rises\"   DISABLED_style= \"max-width:90%; height:auto;\" >, or goes uphill, the line has <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=positive ALIGN=MIDDLE  ALT=\"positive\"   DISABLED_style= \"max-width:90%; height:auto;\" ><IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+slope ALIGN=MIDDLE  ALT=\"+slope\"   DISABLED_style= \"max-width:90%; height:auto;\" >;\r<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=horizontal ALIGN=MIDDLE  ALT=\"horizontal\"   DISABLED_style= \"max-width:90%; height:auto;\" > lines have<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+zero+ ALIGN=MIDDLE  ALT=\"+zero+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=slope ALIGN=MIDDLE  ALT=\"slope\"   DISABLED_style= \"max-width:90%; height:auto;\" >; \r<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=vertical ALIGN=MIDDLE  ALT=\"vertical\"   DISABLED_style= \"max-width:90%; height:auto;\" > lines have <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=no ALIGN=MIDDLE  ALT=\"no\"   DISABLED_style= \"max-width:90%; height:auto;\" ><IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+slope ALIGN=MIDDLE  ALT=\"+slope\"   DISABLED_style= \"max-width:90%; height:auto;\" > (or undefined); <BR>\n" );
document.write( "if the line<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+falls ALIGN=MIDDLE  ALT=\"+falls\"   DISABLED_style= \"max-width:90%; height:auto;\" > (downhill) the <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=slope ALIGN=MIDDLE  ALT=\"slope\"   DISABLED_style= \"max-width:90%; height:auto;\" > is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=negative ALIGN=MIDDLE  ALT=\"negative\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );