G8 U5 Assessment Key

Grade 8 Unit 5 Assessment Defining, Evaluating, and Comparing Functions

Answer Key 1.

B

2.

8.EE.6 6.

A

𝑝(𝑡) = 250 − 2𝑡

3.

8.EE.6 7.

8.EE.6 11 .

C

A

8.

13 .

A. N B. N C. Y D. N

4.

8.EE.6

8.EE.6 12 .

C

D

C

5.

8.EE.6 9.

C

8.EE.6

8.EE.6

𝑓(𝑛) = 3𝑛 − 2 14 .

A. F B. F C. T D. T

D 8.EE.6

10 .

D 8.EE.6

15 .

8 6 4 2

8.EE.6

8.EE.6

8.EE.6

8.EE.6

0 -5

-2

0

5

D: {𝑥|𝑥 = 𝑅} R: {𝑓(𝑥)|𝑓(𝑥) ≥ −1} 8.EE.6 16. Graphs may vary; check student’s graph for accuracy in depicting a relation that is not a function. Possible explanation: The relation I created on the graph is not a function because it fails the vertical line test. As can be seen on my graph one of the inputs produces two outputs, which is not characteristic of a function. 8.EE.6

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