document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=772305>Question 772305</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Write a formula to model the car’s value, where “y” is the value of the car and “x” is the number of years.\r<BR>\n" );
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document.write( "This problem of from graph where the value of the car is 20,000 and depreciates 2,500 each year.. with 7 years being the furthest point on the x axis  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #470788 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39621)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=470788\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Look for ordered pairs in which the coordinates are Years, and Value.<BR>\n" );
document.write( "Read these points from the graph if you want.  You can simply fit the values from the graph into slope-intercept form of equation.  The 20000 value should be the y-intercept, and the slope involves the 2500.  You have slope of NEGATIVE 2500.  This is \"depreciates 2500 dollars each year\".  You would not necessarily need the y value at x=7, depending on what else you want to answer.\r<BR>\n" );
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document.write( "You have then, <BR>\n" );
document.write( "m=-2500<BR>\n" );
document.write( "b=20000<BR>\n" );
document.write( "and slope intercept form for a line is usually used as y=mx+b.<BR>\n" );
document.write( "Fill the values and the result is:  y=-2500x+20000 </SPAN>\n" );
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