document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=620849>Question 620849</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The value, v, in the hundreds of dollars, of Bob's stamp collection is 12 dollars more than 1/3 of the age, t(in years).<BR>\n" );
document.write( "Graph the equation and use the graph to determine the value of Bob's collection if it is 9 years old. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #390428 by </B><A HREF=/tutors/aboutme.mpl?userid=math-vortex><B>math-vortex(648)</B></A><img src=\"/images/stars/stars-11.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=math-vortex><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=math-vortex><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=390428\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Hi, there--<BR>\n" );
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document.write( "Let v be the value of the stamp collection (in hundreds of dollars)<BR>\n" );
document.write( "Let t be the age of the collection (in years)<BR>\n" );
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document.write( "We use the information in the problem to write an equation that models the situation.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=v=%281%2F3%29t%2B12 ALIGN=MIDDLE  ALT=\"v=%281%2F3%29t%2B12\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "We want to know the value v when the collection is 9 years old (t=9). Using the equation, we substitute 9 for t and solve for v.<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=v=%281%2F3%29t%2B12 ALIGN=MIDDLE  ALT=\"v=%281%2F3%29t%2B12\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=v=%281%2F3%29%289%29%2B12 ALIGN=MIDDLE  ALT=\"v=%281%2F3%29%289%29%2B12\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=v=3%2B12 ALIGN=MIDDLE  ALT=\"v=3%2B12\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=v=15 ALIGN=MIDDLE  ALT=\"v=15\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "In the context of this problem, v=15 means that the collection is worth $1,500 (15 hundred dollars).<BR>\n" );
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document.write( "Here is how you would do this on a time vs. value graph (see graph below):<BR>\n" );
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document.write( "The horizontal axis is time t. The vertical axis is value v.<BR>\n" );
document.write( "Go across the horizontal axis to 9 (t=9 years).<BR>\n" );
document.write( "Now move straight up the graph from that point until you touch the line for the equation.<BR>\n" );
document.write( "Look across to see the value on the vertical axis at that point.<BR>\n" );
document.write( "You will see that it is v=15.<BR>\n" );
document.write( "Remember that in this equation, value is in hundreds of dollars, so 15 means $1,500. <BR>\n" );
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document.write( "I hope that this helps! Feel free to email me again if you still have questions.<BR>\n" );
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document.write( "Ms.Figgy<BR>\n" );
document.write( "math.in.the.vortex@gmail.com<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=graph%28+600%2C+400%2C+-5%2C20%2C+-5%2C+20%2C+%281%2F3%29x%2B12%29 ALIGN=MIDDLE  ALT=\"graph%28+600%2C+400%2C+-5%2C20%2C+-5%2C+20%2C+%281%2F3%29x%2B12%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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