document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1086493>Question 1086493</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The credit remaining on a phone card (in dollars) is a linear function of the total calling time made with the card (in minutes). The remaining credit after <BR>\n" );
document.write( "25<BR>\n" );
document.write( "minutes of calls is <BR>\n" );
document.write( "$26.50<BR>\n" );
document.write( ", and the remaining credit after <BR>\n" );
document.write( "53<BR>\n" );
document.write( " minutes of calls is <BR>\n" );
document.write( "$22.58<BR>\n" );
document.write( ". What is the remaining credit after <BR>\n" );
document.write( "61 minutes of calls ? <BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #700713 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=700713\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> set it up as an ordered pair<BR>\n" );
document.write( "(25, 26.50)<BR>\n" );
document.write( "(53, 22.58)<BR>\n" );
document.write( "the slope is -3.92/27=-0.14152<BR>\n" );
document.write( "61 minutes is 8 more than 53.  Multiply that 8 by the slope and get -1.16<BR>\n" );
document.write( "That is subtracted from the $22.58 to get $21.42 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );