document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1063184>Question 1063184</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Suppose that the monthly cost of a long-distance phone plan (in dollars) is a linear function of the total calling time (in minutes). When graphed, the function gives a line with a slope of <BR>\n" );
document.write( "0.12\r<BR>\n" );
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document.write( "The monthly cost for <BR>\n" );
document.write( "39 minutes of calls is <BR>\n" );
document.write( "$15.86. What is the monthly cost for <BR>\n" );
document.write( "47minutes of calls?<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #678234 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=678234\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> This is NOT a proportion as it stands, because there is a basic charge which is the same to both bills. But the slope of the line is the cost of each additional minute, which is 12 cents.  That means that 8 more minutes (from 39 to 47) would cost 96 more cents, and the bill would be $16.82. </SPAN>\n" );
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