document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=810484>Question 810484</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Sales of Plasma TV's in the US were about 1.8 billion in 2000, and 4 billion in 2004. Let t=0 correspond to 2000 and find a model for this data. According to this model, what are sales in 2016?\r<BR>\n" );
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document.write( "t=16 corresponds to 2016\r<BR>\n" );
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document.write( "That's where I got stuck. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #488204 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=488204\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> You can use the general point-slope formula<BR>\n" );
document.write( "The given points are:<BR>\n" );
document.write( "( 0, 1.8 ) and ( 4, 4 )<BR>\n" );
document.write( "Time in years are plotted on the horizontal axis and<BR>\n" );
document.write( "billions of sales are plotted on the vertical axis<BR>\n" );
document.write( "--------------<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%28+s+-+4+%29+%2F+%28+t+-+4+%29+=+%28+1.8+-+4+%29+%2F+%28+0+-+4+%29+ ALIGN=MIDDLE  ALT=\"+%28+s+-+4+%29+%2F+%28+t+-+4+%29+=+%28+1.8+-+4+%29+%2F+%28+0+-+4+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "This is ( change in y ) / ( change in x ) = ( change in y ) / ( change in x )<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%28+s+-+4+%29+%2F+%28+t+-+4+%29+=+-2.2+%2F+%28-4%29+ ALIGN=MIDDLE  ALT=\"+%28+s+-+4+%29+%2F+%28+t+-+4+%29+=+-2.2+%2F+%28-4%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=++%28+s+-+4+%29+%2F+%28+t+-+4+%29+=+1.1%2F2+ ALIGN=MIDDLE  ALT=\"++%28+s+-+4+%29+%2F+%28+t+-+4+%29+=+1.1%2F2+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2%2A%28+s+-+4+%29+=+1.1%2A%28+t+-+4+%29+ ALIGN=MIDDLE  ALT=\"+2%2A%28+s+-+4+%29+=+1.1%2A%28+t+-+4+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2s+-+8+=+1.1t+-+4.4+ ALIGN=MIDDLE  ALT=\"+2s+-+8+=+1.1t+-+4.4+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2s+=+1.1t+%2B+3.6+ ALIGN=MIDDLE  ALT=\"+2s+=+1.1t+%2B+3.6+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+=+.55t+%2B+1.8+ ALIGN=MIDDLE  ALT=\"+s+=+.55t+%2B+1.8+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "-----------------<BR>\n" );
document.write( "You are asked to find the point ( 16, s )<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+=+.55%2A16+%2B+1.8+ ALIGN=MIDDLE  ALT=\"+s+=+.55%2A16+%2B+1.8+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+=+8.8+%2B+1.8+ ALIGN=MIDDLE  ALT=\"+s+=+8.8+%2B+1.8+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s+=+10.6+ ALIGN=MIDDLE  ALT=\"+s+=+10.6+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "There will be 10.6 billion in sales in 2016<BR>\n" );
document.write( "check:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=++%28+s+-+4+%29+%2F+%28+t+-+4+%29+=+1.1%2F2+ ALIGN=MIDDLE  ALT=\"++%28+s+-+4+%29+%2F+%28+t+-+4+%29+=+1.1%2F2+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=++%28+10.6+-+4+%29+%2F+%28+16+-+4+%29+=+1.1%2F2+ ALIGN=MIDDLE  ALT=\"++%28+10.6+-+4+%29+%2F+%28+16+-+4+%29+=+1.1%2F2+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+6.6+%2F+12+=+1.1%2F2+ ALIGN=MIDDLE  ALT=\"+6.6+%2F+12+=+1.1%2F2+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2%2A6.6+=+12%2A1.1+ ALIGN=MIDDLE  ALT=\"+2%2A6.6+=+12%2A1.1+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+13.2+=+13.2+ ALIGN=MIDDLE  ALT=\"+13.2+=+13.2+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "OK<BR>\n" );
document.write( "Here's the plot of the line:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+graph%28+400%2C+400%2C+-2%2C+20%2C+-2%2C+14%2C+.55x+%2B+1.8+%29+ ALIGN=MIDDLE  ALT=\"+graph%28+400%2C+400%2C+-2%2C+20%2C+-2%2C+14%2C+.55x+%2B+1.8+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" > \r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );