document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=752477>Question 752477</A>: <I><SPAN STYLE=\"word-break: break-all;\"> please help..<BR>\n" );
document.write( "In 1980, median family income was about $19,000 and in 2000 it was about $40,000. a) Find the slope of the line passing through the points (1980,19000) and (2000, 40000). b) Interpret the slope as a rate of change. c) If this trend continues, estimate the median family income in 2004.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #457809 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=457809\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> In 1980, median family income was about $19,000 and in 2000 it was about $40,000. <BR>\n" );
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document.write( "You have 2 points: (0,19000) and (20,40,000)<BR>\n" );
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document.write( "a) Find the slope of the line passing through the points (1980,19000) and (2000, 40000).<BR>\n" );
document.write( "slope = (40000-19000)/(2000-1980) = 21000/20 = 2100/2 = 1050<BR>\n" );
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document.write( "b) Interpret the slope as a rate of change.<BR>\n" );
document.write( "The family income increases by $1000 each year from 1980 to 2000<BR>\n" );
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document.write( "c) If this trend continues, estimate the median family income in 2004.<BR>\n" );
document.write( "f(24) = 1000*24+ 19000 = 24000 + 19000 = $43,000<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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