document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=147588>Question 147588</A>: <I><SPAN STYLE=\"word-break: break-all;\"> the number of radio stations on the air from 1950 to 1995 may be modeled by <BR>\n" );
document.write( "f(x)214.3x-415,368, where x is the year\r<BR>\n" );
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document.write( "how man radio stations were on air in 1980<BR>\n" );
document.write( "i'm not sure if i replace 1980 with x, and i'll get 8946\r<BR>\n" );
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document.write( "what is the slope of the graph<BR>\n" );
document.write( "not certain \r<BR>\n" );
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document.write( "interept the slope as a rate<BR>\n" );
document.write( "huh?\r<BR>\n" );
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document.write( "lol, hopefully someone can help! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #107967 by </B><A HREF=/tutors/aboutme.mpl?userid=adamchapman><B>adamchapman(301)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=adamchapman><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=107967\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The number of radio stations at any year is\r<BR>\n" );
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document.write( "f(x) = 214.3x-415,368\r<BR>\n" );
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document.write( "in 1980, x=1980\r<BR>\n" );
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document.write( "so f(1980) = 214.3(1980)-415,368   =  8964\r<BR>\n" );
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document.write( "slope of the graph is the change in f(x) due to a unit change in x (like the slope of the line y= m*x+c is m)\r<BR>\n" );
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document.write( "so the slope is 214.3\r<BR>\n" );
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document.write( "To interpret as a rate, look at what the function f(x) represents: the number of radio stations in a year.\r<BR>\n" );
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document.write( "The rate represented by the slope is 214.3 radiostations per year.\r<BR>\n" );
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document.write( "Hope this helps,\r<BR>\n" );
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document.write( "Adam </SPAN>\n" );
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