Algebra 1
Section 7 Exponential Functions Test Review
1. You decide to buy a used car that costs $10,000. You've heard that the car may
depreciate at a rate of 10% per year. At that rate, what will the car be worth in 5 years?
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2. What is f(x) = 5* evaluated for x = 32
X-R
3. Bacteria are tiny one-celled creatures. Bacteria are vital to life but some bacteria cau
sickness. Bacteria can multiply very quickly in the right conditions. If we assume that
bacteria triple every hour, how many bacteria will there be after 18 hours if there are 1
bacteria now? Write a function to represent the growth of the bacteria over time.
4. What is f(x) = 4(-3)* evaluated for x = 2?
5. Which of the following is a geometric sequence? Identify
a) –1, 4, 9, 16, ...
b)-4, 8, -16, 32, ...
1
5. Which is the seventh term of the geometric sequences
1
1 2
, 1, ...?
Identify the equation for the graph