Percent Change Exponential

What is the starting amount, for the function: f(x) = 300(1.16)^x?

• 300

• 1.16

• .16

• x

Which of the following functions shows an initial amount of $15 and an increase of 35% each year?

• y = 15(35)^x

• y = 15(1.35)^x

• y = 15(0.35)^x

• y = 35(1.15)^x

The expression 12(1.02)^t models the population of elephants in a wildlife refuge after t years since 1975.

What does the value 1.02 represent?

• The number of elephants was 102 in 1975.

• The number of elephants increases by 2% each year.

• The number of elephants increases by 102% each year.

• Two extra elephants join the population each year

Suppose a culture of bacteria begins with 5000 cells and dies by 30% each year. Write an equation that represents this situation.

• y=5000(1 - 0.30)^x

• y=30(5000)^x

• y=5000(1 + 0.30)^x

• y=5000x^x

Identify the percent (%) increase or decrease for the function below:

f(x) = 3000 (1.17)^x

• Increase by 0.17%

• Increase by 17%

• Decrease by 17%

• Decrease by 0.17%

what is the percent increase/decrease of this exponential function? y=47(1.09)^x

?

• The value 0.94 indicates the constant rate of change in millions of viewers per week is 6 less than the week before.

• The value 0.94 indicates the constant rate of change in millions of viewers per week is 94 less than the week before.

• The value 0.94 indicates the constant percent of change in millions of viewers per week is 6% less than the week before.

• The value 0.94 indivates the constant percent of change in millions of viewers per week is 94% less than the week before.

Which of the following functions shows an initial amount of $15 and an increase of 35% each year?

• y = 15(1.035)^x

• y = 15(1.35)^x

• y = 15(0.35)^x

• y = 15(0.65)^x

Identify the percent (%) increase or decrease for the following function. f(x) = 35 (1 – 0.06)

• Increase by 6%

• Decrease by 0.06%

• Increase by 0.06%

• Decrease by 6%

The population of Winnemucca, Nevada, can be modeled by P=6191(1.04)^t where t is the number of years since 1990. What percent did the population increase each year?

• 4%

• It doesn't say

• I don't know

• 400%