document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=722989>Question 722989</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A small business buys a computer for $4900. After 4 years the value of the computer is expected to be $200. For accounting purposes the business uses straight-line depreciation (this means that if V is the value of the computer at time t, then a linear equation is used to relate V and t) to assess the value of the computer at a given time.<BR>\n" );
document.write( "(a) Find a linear equation that models the value V of the computer t years since its purchase. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #442969 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=442969\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A small business buys a computer for $4900. After 4 years the value of the computer is expected to be $200. For accounting purposes the business uses straight-line depreciation (this means that if V is the value of the computer at time t, then a linear equation is used to relate V and t) to assess the value of the computer at a given time.<BR>\n" );
document.write( "(a) Find a linear equation that models the value V of the computer t years since its purchase.<BR>\n" );
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document.write( "You have two points relating time and value: (0,4000) and (4,200)<BR>\n" );
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document.write( "slope = (200-4000)/4 = -3800/4 = -950<BR>\n" );
document.write( "intercept = f(0) = 4000<BR>\n" );
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document.write( "Equation:<BR>\n" );
document.write( "value(x) = -950x + 4000 where x is the number of years.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "================= </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );