document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1205638>Question 1205638</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In 1990, the National Park system consisted of about 76.4 million acres. By 2009, the figure had grown to 80.4 million acres. Let A(t) represent the amount of land in the National Park system, in millions of acres, t years after 1990.\r<BR>\n" );
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document.write( "a. Find the rate of change in the amount of land in the National Park system.\r<BR>\n" );
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document.write( "b. Using the given variables write linear function that fits the data. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #842572 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39617)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=842572\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> (0,76.4) & (19,80.4)<BR>\n" );
document.write( "t at 0 corresponds to year 1990.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A=%28%2880-76%29%2F%2819%29%29t%2B76.4 ALIGN=MIDDLE  ALT=\"A=%28%2880-76%29%2F%2819%29%29t%2B76.4\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28A=highlight_green%28%284%2F19%29%29t%2B76.4%29 ALIGN=MIDDLE  ALT=\"highlight%28A=highlight_green%28%284%2F19%29%29t%2B76.4%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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