document.write( "Question 1072549: A printer costs $960 new and is expected to be worth $140 after six years. What will it be worth after four years? \n" ); document.write( "

Algebra.Com's Answer #687452 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
This is a straight line relation, and the slope
\n" ); document.write( "does not change
\n" ); document.write( "slope = [ change in cost ] / [ time in yrs ]
\n" ); document.write( " $\"+%28+140+-+960+%29+%2F+%28+6+-+0+%29+\"$
\n" ); document.write( " $\"+%28+-820+%29+%2F6+=+-136.667+\"$
\n" ); document.write( "Since the slope doesn't change, I can say:
\n" ); document.write( "Let $\"+v+\"$ = value after 4 yrs
\n" ); document.write( " $\"+-136.667+=+%28+v+-+960+%29+%2F+%28+4+-+0+%29+\"$
\n" ); document.write( " $\"+v+-+960+=+-546.667+\"$
\n" ); document.write( " $\"+v+=+413.333+\"$
\n" ); document.write( "The printer will be worth $413.33 in 4 yrs
\n" ); document.write( "---------------------------------------
\n" ); document.write( "Check:
\n" ); document.write( "I can also say:
\n" ); document.write( " $\"+%28+140+-+413.333+%29+%2F+%28+6+-+4+%29+=+-136.667+\"$
\n" ); document.write( " $\"+-273.333%2F2+=+-136.667+\"$
\n" ); document.write( " $\"+-136.667+=+-136.667+\"$
\n" ); document.write( "OK
\n" ); document.write( "Definitely check my math
\n" ); document.write( " \n" ); document.write( "

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