Use the rule for term n of a linear growth or decay model
A courier company's delivery van costs $37,250 new, and its value falls at a flat rate of 9.1% p.a.
Let \(V_n\) be the value of the van, in dollars, after \(n\) years
\[V_0 = \$37{,}250\]
\[V_{n+1} = V_n - \$3{,}389.75\]