document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=204378>Question 204378</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Number of Credits /	    Fees<BR>\n" );
document.write( "3	          /         2000<BR>\n" );
document.write( "6	          /         2600<BR>\n" );
document.write( "9	          /         3200<BR>\n" );
document.write( "12	          /         3800<BR>\n" );
document.write( "15	          /         4400\r<BR>\n" );
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document.write( "(a)	Write an equation to calculate the fees F when the number of credits n is given?\r<BR>\n" );
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document.write( "(b)	Use this equation from part (a) to calculate the fee for 17 credits.\r<BR>\n" );
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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 #154327 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=154327\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  Number of Credits / Fees<BR>\n" );
document.write( "3 / 2000<BR>\n" );
document.write( "6 / 2600<BR>\n" );
document.write( "9 / 3200<BR>\n" );
document.write( "12 / 3800<BR>\n" );
document.write( "15 / 4400 <BR>\n" );
document.write( "(a) Write an equation to calculate the fees F when the number of credits n is given? <BR>\n" );
document.write( "You can see that for every increase of 3 credits the fees increases by 600.<BR>\n" );
document.write( "So the function is linear.<BR>\n" );
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document.write( "Use any two points to find the linear equation:<BR>\n" );
document.write( "slope = (2600-2000)/(6-3) = 600/3 = 200<BR>\n" );
document.write( "Form y = mx + b<BR>\n" );
document.write( "2000 = 200*3 + b<BR>\n" );
document.write( "b = 1400<BR>\n" );
document.write( "Equation: fee(x) = 200x + 1400 where x is the number of credits<BR>\n" );
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document.write( "(b) Use this equation from part (a) to calculate the fee for 17 credits. <BR>\n" );
document.write( "fee(17) = 200*17+1400 = $4800<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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