document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1071837>Question 1071837</A>: <I><SPAN STYLE=\"word-break: break-all;\"> monthly charge for garbage collection is $12 for 42lbs and $16.80 for 50lbs, derive a a linear cost function </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #686745 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=686745\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  monthly charge for garbage collection is $12 for 42lbs and $16.80 for 50lbs, derive a a linear cost function <BR>\n" );
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document.write( "You have 2 points relating lbs and cost:: (421,12) and (50,16.8)<BR>\n" );
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document.write( "slope = (16.8-12)/(50-421) = -0.0129<BR>\n" );
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document.write( "Form:: cost = slope*weight + b<BR>\n" );
document.write( "Solve for \"b\" using cost = 12 and weight = 421 and slope = -0.0129<BR>\n" );
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document.write( "12 = -0.0129*421 + b<BR>\n" );
document.write( "b = 6.55<BR>\n" );
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document.write( "Equation:<BR>\n" );
document.write( "C(lbs) = -0.129(lbs) + 6.55<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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