document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=455324>Question 455324</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 1. The average price of an acre of land in some country was $1222 in 2001. In 2006, the price rose to approximately $1702.<BR>\n" );
document.write( "a. two ordered pairs of the form (year, price of acre) are?<BR>\n" );
document.write( "b. The slop of the line through the two points is approximately?<BR>\n" );
document.write( "c. Choose the correct interpreations of the slope.\r<BR>\n" );
document.write( "\n" );
document.write( "2. In 1980, median family income was about $17,000, and in 2000 it was about $41,000.<BR>\n" );
document.write( "a. find the slope.<BR>\n" );
document.write( "b. interpret the slope as a rate change.<BR>\n" );
document.write( "c. the median family income in 2005 will be?     </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #312601 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=312601\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 1. The average price of an acre of land in some country was $1222 in 2001. In 2006, the price rose to approximately $1702.<BR>\n" );
document.write( "a. two ordered pairs of the form (year, price of acre) are?<BR>\n" );
document.write( "Ans: (1,1222) and (6,1702)<BR>\n" );
document.write( "---------------------------------------<BR>\n" );
document.write( "b. The slope of the line through the two points is approximately?<BR>\n" );
document.write( "Ans: (1702-1222)/(6-1) = 480/5 = 96<BR>\n" );
document.write( "---------------------------------------<BR>\n" );
document.write( "c. Choose the correct interpreations of the slope.<BR>\n" );
document.write( "Each year the average price increases by $96<BR>\n" );
document.write( "---------------------------------------<BR>\n" );
document.write( "============================================================================== <BR>\n" );
document.write( "2. In 1980, median family income was about $17,000, and in 2000 it was about $41,000.<BR>\n" );
document.write( "a. find the slope.<BR>\n" );
document.write( "Ans: (41000-17000)/(2000-1980) = 1200<BR>\n" );
document.write( "-------------------------------------------------------------------------<BR>\n" );
document.write( "b. interpret the slope as a rate change.<BR>\n" );
document.write( "Each year the median family income increases by $1200 <BR>\n" );
document.write( "---------------------------------------------------------- <BR>\n" );
document.write( "c. the median family income in 2005 will be?<BR>\n" );
document.write( "I(x) = 1200x + b<BR>\n" );
document.write( "Solve for \"b\":<BR>\n" );
document.write( "b = 17000<BR>\n" );
document.write( "I(x) = 1200x + 17000<BR>\n" );
document.write( "I(25) = 1200*25 + 17000<BR>\n" );
document.write( "I(25) = $47,000<BR>\n" );
document.write( "========================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "=============================== <BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );