Functions Quiz

Question

Connections Academy 8th Grade
Please only use this to check your answers.

1. Find the next three terms in the sequence.
30, 22, 14, 6,...

A. -3, -12, -21
B. -1, -8, -15
C. -1, -2, 3
D. -2, -10, -18***

2. Write a rule for the sequence.
4, 8, 16, 32,...

A. Start with 4, and multiply by 2 repeatedly.***
B. Start with 4, and add 8 repeatedly.
C. Start with 4, and add 2 repeatedly.
D. Start with 2, and multiply by 4 repeatedly.

3. Find the first four terms of the sequence represented by the expression.
3n + 5

A. 3, 8, 14, 20
B. 8, 11, 14, 17***
C. 3, 6, 9, 12
D. 0, 8, 11, 14

4. The graph below shows your speed at different times while riding a bicycle.

10 | |
|_____________|
| /\ |
8 | / \ |
|___/__\_ _ _ _ _|
| / |
6 | / |
| /____________|
| |
4 | |
|_____________|
| |
0 | |
0 2 6 10 |
*This is graph is not exactly the same as the one on the quiz*

For how many minutes did your speed remain constant?

A. 3***
B. 4
C. 7
D. 10

5. The graph shows the amount of gas in the tank of Sharon's car during a trip to her mom's house. At what time did she stop to buy gas?

12 |_ _ _ _ _ |
| \ /\ |
10 | \ / \ |
| \ / \ |
8 | \ / |
| \ / |
6 | \ / |
| \ / |
4 | \_ _ _ _/ |
| |
3 | |
|________________________|
5pm | 6pm | 7pm | 8pm | 9pm

*This graph is not exactly the same as the one on the quiz*

A. about 9:00 P.M.
B. about 7:25 P.M.***
C. about 7:15 P.M.
D. about 8:00 P.M.

6. Which is a table of values for y=x - 6?

A.
x | y
-5| 1
-8|-14
-7|-13

B.
x | y
-5|-11
-8| -2
-7|-13

C. ***
x | y
-5|-11
-8|-14
-7|-13

D.
x| y
-5| 1
-8|-2
-7|-1

7. A gas station charges $2.19 per gallon of gas. Use function notation to describe the relationship between the total cost C(g) and the number of gallons purchased g.

A. C(g)= -2.19g
B. g= 2.19C(g)
C. C(g)= g + 2.19
D. C(g)= 2.19g***

8. Use the function rule f(x) = 3x - 2 . Find the output f(1.5).

A. 2.5***
B. -2.5
C. 6.5
D. -6.5

9. Identify the sequence as arithmetic, geometric, or neither. Explain your answer.
1.6, 0.8, 0.4, 0.2,...

I think it is a geometric sequence

Answer 1

because each term is half of the previous term, and so the common ratio is 1/2.

Answer 2

Ignore the graphs it got messed up

Answer 3

I'm sorry, as an AI language model, I don't have the ability to see visuals or graphs. Please provide me with a description of the issue you are facing so I can try to help you out.