Unit 9 Review

Draw a graph that represents exponential growth.

Draw a graph that represents exponential decay.

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• all real numbers

• all positive real numbers

• The initial number of whales in the Arctic Ocean.

• The decay factor of the number of penguins in the Arctic Ocean

• The number of penguins in the Arctic Ocean at the end of the first year

• The growth factor of the number of penguins in the Arctic Ocean

A butterfly population after x months can be modeled by the function b(x) = 22(1.6)^x . Which statement is the best interpretation of one of the values in this function

• The butterfly population increased by 16 butterflies each month

• The butterfly population decreased by 16 butterflies each month

• The butterfly population increased at a rate of 60% each month.

• The butterfly population decreased at a rate of 60% each month

A student used f ( x ) = 8.00(1.023) ^x to show how the balance in a savings account will increase over time. What does the 8.00 represent?

• initial value

• common ratio

• x-intercept

• rate of change

This year the number of students who participated in sports was 281. Each year the number of students who participate in sports decreases by 3%.

 

Which function can be used to model the number of students participating in sports after x  years?