Quiz about Writing Exponential Functions

Question 1

The population of 10,000 mosquitos is cut in half each month when a colony of bats moves in the area. What is the equation?

Accepted Answer

10000(0.5)^x

Answer

10000(1.5)^x

Answer

.5(10000)^x

Answer

10000(0.05)^x

Question 2

Layla's 4 hour daily phone time decreases by 5% per day.

Accepted Answer

4(.95)x

Answer

4(1.05)x

Answer

4(.5)x

Answer

4(5)x

Question 3

Declan's bank account balance can be modeled by the equation F(x) = 3000(1.035)^x. What does the 30000 mean?

Accepted Answer

Starting amount

Answer

Growth rate

Answer

Final amount

Answer

X-values

Question 4

Declan's bank account balance can be modeled by the equation F(x) = 3000(1.035)^x. Is his account growing or decaying?

Accepted Answer

Growing

Answer

Decaying

Question 5

Declan's bank account balance can be modeled by the equation F(x) = 3000(1.035)^x. At what percent is his account growing or decaying?

Accepted Answer

3.5%

Answer

1035%

Answer

3000%

Answer

35%

Question 6

Is the equation below growth or decay? F(x) = 10(4.5)^x

Accepted Answer

Growth

Answer

Decay

Question 7

What is the range of this situation?

Accepted Answer

0 < y < 45000

Answer

x > 0

Answer

0 < x < 10

Answer

y < 45000

Question 8

What is the exponential equation for the table below?

Accepted Answer

y = 3500(.95)^x

Answer

y = 3500(1.05)^x

Answer

y = 3325(1.05)^x

Answer

y = 3325(.95)^x

Question 9

Which equation best matches this graph?

Accepted Answer

y = 45000(.88)^x

Answer

y = 45000(1.12)^x

Answer

y = 45000(.08)^x

Answer

y = .88(45000)^x

Question 10

Which scenario best matches y = 500(1.25)^x ?

Accepted Answer

Landon's Pokemon card is worth $500 new and will increase in value by 25% a year.

Answer

Aiden has $500 in his bank account and it is growing 2.5% per year.

Answer

Ink's any farm population is 1.25 and is increasing by 200 ants per month.

Answer

Tyler's $500 car will be worth 25% less each year.

Question 11

What is the asymptote for the equation F(x) = 10(4.5)^x ?

Accepted Answer

y = 0

Answer

x = 0

Answer

y = 10

Answer

x = 4.5

Question 12

A population of bees starts out with 10 bees and doubles every day.

Accepted Answer

$$y=10\left(2\right)^x$$

Answer

$$y=10\left(2\right)^{\frac{x}{2}}$$

Answer

$$y=2\left(10\right)^x$$

Answer

$$y=10\left(\frac{1}{2}\right)^x$$

Question 13

The number of mosquitoes at the beginning of the summer was 4,000. The population of mosquitoes is expected to grow at a rate of 25% a month. How many mosquitoes will there be after 4 months? Round your answer

Accepted Answer

9765

Answer

9765.625

Answer

9006

Answer

5433

Question 14

Write an exponential function to model the situation. Then solve.

The cost of tuition at a college is $12,000 and is increasing at a rate of 6% per year. What will the cost be after 4 years?

Accepted Answer

C(t) = 12000(1.06)^t ; $15149.72

Answer

C(t) = 12000(1.06)^t ; $3149.72

Answer

C(t) = 12000(.06)^t ; $3149.72

Answer

C(t) = 12000(.06)^t ; $1472.95

Question 15

Write an exponential function to model the situation. The value of a car is $18000 and is depreciating at a rate of 12% per year.

Accepted Answer

V(t) = 18000(.88)^t

Answer

V(t) = .88(18000)^t

Answer

V(t) = .12(18000)^t

Answer

V(t) = 18000(.12)^t

Question 16

What is the decay rate for the function: f(x) = 800(0.85)^x?

Accepted Answer

15%

Answer

800

Answer

0.85

Answer

x

Question 17

When is the Algebra 1 EOC STAAR?

Accepted Answer

May 4th

Answer

May 5th

Answer

April 5th

Answer

Not happening ever

Question 18

Question 18.

Accepted Answer

B

Answer

A

Answer

C

Answer

D

Writing Exponential Functions

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