Quiz about Unit 6 Exponential Functions

Question 1

How do I know that a common ratio is negative?

Accepted Answer

Every other number in the sequence is negative

Answer

Every number in the sequence is negative

Answer

Every number in the sequence is positive

Answer

The difference between two consecutive numbers is negative

Question 2

True or false

This sequence is geometric:

500, 100, 20, 4, .8....

Accepted Answer

True, it goes down at the same rate

Answer

True, it goes up at the same rate

Answer

False

Question 3

To find the 12th term of a geometric sequence,

$$-2,10,-50,\ 250...$$ use the explicit equation

$$a_n=a_1\cdot r^{\left(n-1\right)}$$

What is $$a_1$$ ?

Accepted Answer

-2

Answer

12

Answer

5

Answer

-5

Question 4

To find the 12th term of a geometric sequence,

$$-2,10,-50,\ 250...$$ use the explicit equation

$$a_n=a_1\cdot r^{\left(n-1\right)}$$

What is $$r$$ ?

Accepted Answer

-5

Answer

-2

Answer

12

Answer

5

Question 5

To find the 12th term of a geometric sequence,

$$-2,10,-50,\ 250...$$ use the explicit equation

$$a_n=a_1\cdot r^{\left(n-1\right)}$$

What is $$n$$ ?

Accepted Answer

12

Answer

-2

Answer

5

Answer

-5

Question 6

To find the 12th term of a geometric sequence,

$$-2,10,-50,\ 250...$$ use the explicit equation

$$a_n=a_1\cdot r^{\left(n-1\right)}$$

What is the 12th term?

Accepted Answer

9,756,250

Answer

110

Answer

100,000,000,000

Answer

-60

Question 7

If the parent function is $$2^x$$

Where will $$2^{\left(x-5\right)}$$ move?

Accepted Answer

5 right

Answer

5 up

Answer

5 down

Answer

5 left

Question 8

If the parent function is $$2^x$$

Where will $$2^x-5$$ move?

Accepted Answer

5 down

Answer

5 up

Answer

5 left

Answer

5 right

Question 9

Which one will NOT reverse an exponential function of the form

$$y=ab^x$$ ,

Accepted Answer

make a a fraction

Answer

make b a fraction

Answer

make x negative

Question 10

What is the formula to find the value of a used car that was 12,800 dollars and depreciated at a rate of 8% per year for 5 years?

Accepted Answer

$$a\left(1-r\right)^t$$

Answer

$$a\left(1+r\right)^t$$

Answer

$$a\left(1-\frac{r}{t}\right)$$

Answer

$$a\left(1+\frac{r}{t}\right)$$

Question 11

What is the principal of the problem

to find the value of a used car that was 12,800 dollars and depreciated at a rate of 8% per year for 5 years?

Accepted Answer

12,800

Answer

8%=.08

Answer

5

Answer

1

Question 12

What is the rate of the problem

to find the value of a used car that was 12,800 dollars and depreciated at a rate of 8% per year for 5 years?

Accepted Answer

8%=.08

Answer

12,800

Answer

5

Answer

1

Question 13

What is the time of the problem

to find the value of a used car that was 12,800 dollars and depreciated at a rate of 8% per year for 5 years?

Accepted Answer

5

Answer

12,800

Answer

8%=.08

Answer

1

Question 14

What is the value of a used car that was 12,800 dollars and depreciated at a rate of 8% per year for 5 years?

Accepted Answer

8436.23

Answer

1024

Answer

5120

Answer

9169.82

Question 15

Find 3 points for

$$y=3^x$$

Accepted Answer

(0,1)

Accepted Answer

(1,3)

Accepted Answer

(2,9)

Answer

(0,3)

Answer

(2,6)

Question 16

The starting salary at a construction company is $65,000 and increases at a rate of 3.1% for 4 years.

What is the correct formula?

Accepted Answer

$$f\left(n\right)=a\left(1+r\right)^t$$

Answer

$$f\left(n\right)=a\left(1-r\right)^t$$

Question 17

The starting salary at a construction company is $65,000 and increases at a rate of 3.1% for 4 years.

What is the correct principal?

Accepted Answer

65,000

Answer

4

Answer

3.1%=.031

Question 18

The starting salary at a construction company is $65,000 and increases at a rate of 3.1% for 4 years.

What is the correct time?

Accepted Answer

4

Answer

3.1%=.031

Answer

65,000

Question 19

The starting salary at a construction company is $65,000 and increases at a rate of 3.1% for 4 years.

What is the correct rate?

Accepted Answer

3.1%=.031

Answer

4

Answer

65,000

Question 20

The starting salary at a construction company is $65,000 and increases at a rate of 3.1% for 4 years.

What is the salary in 4 years?

Accepted Answer

73,442.60

Answer

67,015

Answer

286,060

Unit 6 Exponential Functions

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