document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1147223>Question 1147223</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In 2009 the number of vehicle sales in the United States was 10,602 thousand and in 2013 it was 15,884 thousand.\r<BR>\n" );
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document.write( "a.[3 pts] Determine the average rate of change (slope) from 2009 to 2013. \r<BR>\n" );
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document.write( "b.[3 pts] If X is the number of years since 2009 and f(X) is the number of vehicles sold, find the equation of the line through these two points.\r<BR>\n" );
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document.write( "c.[2pts] Assuming f(X) is a linear function, use the equation to predict the number of vehicles sold in 2016. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #768537 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=768537\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The given points are:<BR>\n" );
document.write( "( 0, 10602 )<BR>\n" );
document.write( "( 4, 15884 )<BR>\n" );
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document.write( "a.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+%28+15884+-+10602+%29+%2F+%28+4+-+0+%29+ ALIGN=MIDDLE  ALT=\"+%28+15884+-+10602+%29+%2F+%28+4+-+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=+5282+%2F+4+=+1320.5+ ALIGN=MIDDLE  ALT=\"+5282+%2F+4+=+1320.5+\"   DISABLED_style= \"max-width:90%; height:auto;\" > thousands / yr<BR>\n" );
document.write( "b.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+f%28x%29+=+1320.5x+%2B+10602+ ALIGN=MIDDLE  ALT=\"+f%28x%29+=+1320.5x+%2B+10602+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "c.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+f%28x%29+=+1320.5%2A7+%2B+10602+ ALIGN=MIDDLE  ALT=\"+f%28x%29+=+1320.5%2A7+%2B+10602+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+f%28x%29+=+9243.5+%2B+10602+ ALIGN=MIDDLE  ALT=\"+f%28x%29+=+9243.5+%2B+10602+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+f%28x%29+=+19845.5+ ALIGN=MIDDLE  ALT=\"+f%28x%29+=+19845.5+\"   DISABLED_style= \"max-width:90%; height:auto;\" > <BR>\n" );
document.write( "19,845,500 vehicles<BR>\n" );
document.write( "check the math\r<BR>\n" );
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document.write( " </SPAN>\n" );
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