document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=723900>Question 723900</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Suppose that in the year 2000, the cost of a compact car averaged $ 12700 and that in 2003, the cost averaged $ 15100. Assuming that the relationship between year t and cost c is linear, develop a formula for predicting the average cost of a compact car in the future measuring the variable t  as years since 2000. <BR>\n" );
document.write( " my formula is Q=Q_(1+r)^  Q_ = 12,700 R = needed Q= 15,100 T= 3  ? I am lost after this \r<BR>\n" );
document.write( "\n" );
document.write( "What do you predict the average cost of a compact car will be in the year 2007? . </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #443527 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=443527\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> They say the relation is linear, which means<BR>\n" );
document.write( "a straight line. Use the general point-slope formula.<BR>\n" );
document.write( "Plot <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+c+ ALIGN=MIDDLE  ALT=\"+c+\"   DISABLED_style= \"max-width:90%; height:auto;\" > on the vertical axis and <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+ ALIGN=MIDDLE  ALT=\"+t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "on the horizontal axis.<BR>\n" );
document.write( "For the year 2000, make <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+0+ ALIGN=MIDDLE  ALT=\"+t+=+0+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "-------------<BR>\n" );
document.write( "given:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%28+c+-+12700+%29+%2F+%28+t+-+0+%29+=+%28+15100+-+12700+%29+%2F+%28+3+-+0+%29+ ALIGN=MIDDLE  ALT=\"+%28+c+-+12700+%29+%2F+%28+t+-+0+%29+=+%28+15100+-+12700+%29+%2F+%28+3+-+0+%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+c+-+12700+%29+%2F+t+=+2400+%2F+3+ ALIGN=MIDDLE  ALT=\"+%28+c+-+12700+%29+%2F+t+=+2400+%2F+3+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%28+c+-+12700+%29+%2F+t+=+800+ ALIGN=MIDDLE  ALT=\"+%28+c+-+12700+%29+%2F+t+=+800+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+c+-+12700+=+800t+ ALIGN=MIDDLE  ALT=\"+c+-+12700+=+800t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+c+=+800t+%2B+12700+ ALIGN=MIDDLE  ALT=\"+c+=+800t+%2B+12700+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "--------------------<BR>\n" );
document.write( "check:<BR>\n" );
document.write( "( 0,12700)<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+c+=+800t+%2B+12700+ ALIGN=MIDDLE  ALT=\"+c+=+800t+%2B+12700+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+12700+=+800%2A0+%2B+12700+ ALIGN=MIDDLE  ALT=\"+12700+=+800%2A0+%2B+12700+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+12700+=+12700+ ALIGN=MIDDLE  ALT=\"+12700+=+12700+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "OK<BR>\n" );
document.write( "(3,15100)<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+c+=+800t+%2B+12700+ ALIGN=MIDDLE  ALT=\"+c+=+800t+%2B+12700+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+15100+=+800%2A3+%2B+12700+ ALIGN=MIDDLE  ALT=\"+15100+=+800%2A3+%2B+12700+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+15100+=+2400+%2B+12700+ ALIGN=MIDDLE  ALT=\"+15100+=+2400+%2B+12700+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+15100+=+15100+ ALIGN=MIDDLE  ALT=\"+15100+=+15100+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "OK<BR>\n" );
document.write( "In 2007, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+7+ ALIGN=MIDDLE  ALT=\"+t+=+7+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+c+=+800t+%2B+12700+ ALIGN=MIDDLE  ALT=\"+c+=+800t+%2B+12700+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+c+=+800%2A7+%2B+12700+ ALIGN=MIDDLE  ALT=\"+c+=+800%2A7+%2B+12700+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+c+=+5600+%2B+12700+ ALIGN=MIDDLE  ALT=\"+c+=+5600+%2B+12700+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+c+=+18300+ ALIGN=MIDDLE  ALT=\"+c+=+18300+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "In 2007, the average cost will be $18,300\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );