Algebra 2
Name: __________________
Chapter 3b Review
Block: _____
Calculator Allowed
For questions 1 – 4, use the table below which shows the amount of the US national debt per US citizen.
Year
1980
1981
1982
1983
1984
1985
1986
Debt per Citizen
$3985
$4338
$4918
$5870
$6640
$7598
$8774
1.
Write an exponential equation that models the growth of the debt as a function of the number of years after 1980.
2.
Write a linear equation that models the growth of the debt as a function of the number of years after 1980.
3.
Which equation is a “better fit” to the data.
Explain your choice.
4.
Use the equation you decided to use in question 3 to predict the debt in 1995.
5.
Use the equation you decided to use in question 3 to predict the debt in 1975.
6.
Use the equation you decided to use in question 3 to predict when the debt will reach $120,000 per citizen.
For questions 7  9, use the equations
1
nt
r
BP
n
and
rt
e
.
7.
You invested $1500 into a bank account that promises to give you 5% interest compounded monthly.
How much is in
your account after 2 years?
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 Spring '08
 staff
 Algebra, 1907, 1911, 1908, United States public debt

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