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2. Try it!
You have just opened your own bank account,
with an initial deposit amount of 2000 Euro.
Suppose your monthly income is 3000 Euro,
and you will spend 60 percent of what you have
in the account every month, how much will your
balance be after one year? How much will you
have in the account, 6 months from now?
The example can be expressed as a sequential equation, as
follows:
u
= u
n
where u
of the previous month, and n is the month.
CONCEPT
1. Grasp the idea of sequential equations.
2. Use the graph tracing function to obtain approximate values.
× (1 – 0.6) + 3000
n–1
is the balance of the current month and u
n
Chapter 4: Graphing Features
is the balance
n–1
71
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