document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=51822>Question 51822</A>: <I><SPAN STYLE=\"word-break: break-all;\"> using a phone card to make a long distance call costs a flat fee of $0.75 plus $0.25 per minute. What is an equation of the form y=mx +b for this situation, assuming y represents the total cost of calling for x minutes? How much does it cost to talk for 5 minutes? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #34638 by </B><A HREF=/tutors/aboutme.mpl?userid=funmath><B>funmath(2933)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=funmath><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=34638\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Total cost of calling x minutes: y<BR>\n" );
document.write( "number of minutes called: x<BR>\n" );
document.write( "rate per minute is the slope m: $0.25<BR>\n" );
document.write( "flat fee without adding minutes is b: $0.75<BR>\n" );
document.write( "Substitue these values into y=mx+b and you have:<BR>\n" );
document.write( "y=.25x+.75<BR>\n" );
document.write( "In order to find out the cost of talking 5 minutes, substitute 5 in for x:<BR>\n" );
document.write( "y=.25(5)+.75<BR>\n" );
document.write( "y=1.25+.75<BR>\n" );
document.write( "y=2.00<BR>\n" );
document.write( "It costs $2.00 to talk five minutes. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );