document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=53805>Question 53805</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 1.)  Sales last month were 4000.00, this month they were 5000.00. Write an equation that shows this using y for sales and x for the month. (this month x=0, last month x=-1, next month x=1 etc...   2.) What will the sales be 4 months from now?  \r<BR>\n" );
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document.write( "Can someone show me how to work this?  Thanks. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #36206 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=36206\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> (month time,amount from sales)<BR>\n" );
document.write( "Points: (-1,4000) and (0,5000)<BR>\n" );
document.write( "M = (y2 - y1)/(x2 - x1) = (4000 - 5000)/(-1 - 0) = -1000/-1 = 1000<BR>\n" );
document.write( "y - y1 = m(x - x1)<BR>\n" );
document.write( "y - 5000 = 1000(x - 0)<BR>\n" );
document.write( "y - 5000 = 1000x<BR>\n" );
document.write( "y = 1000x + 5000<BR>\n" );
document.write( "In 4 months (x = 4), the amount will be 9000.00<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=graph%28300%2C300%2C-5%2C5%2C-1000%2C9000%2C1000x%2B5000%29 ALIGN=MIDDLE  ALT=\"graph%28300%2C300%2C-5%2C5%2C-1000%2C9000%2C1000x%2B5000%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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