document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=230477>Question 230477</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Media Services charges $40 for a phone and $20 a month for its economy plan. Find a model that determines the total cost c(t), of operating a media services phone for t months.\r<BR>\n" );
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document.write( "(I'm not sure what this is covered under to it is algebra though) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #170769 by </B><A HREF=/tutors/aboutme.mpl?userid=texttutoring><B>texttutoring(324)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=texttutoring><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=texttutoring><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=170769\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The $40 is spent on the phone at the start, when t=0. So before any time has passed, you have already spent $40. This represents the y-intercept.\r<BR>\n" );
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document.write( "Each month, you have to pay $20. $20/month represents your slope in a graph of Cost vs. Time (in months).\r<BR>\n" );
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document.write( "c(t)=20t+40 </SPAN>\n" );
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