Functions Worksheet

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Functions Worksheet

Grade: grade8 •Date: 10/18/2026 •Problems: 10
1

Do these pairs represent a function? (1→2, 2→4, 3→6)

✓
A.Yes
B.No
C.Sometimes
D.Cannot determine

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2

Do these pairs represent a function? (1→2, 2→4, 3→6)

✓
A.Yes
B.No
C.Sometimes
D.Cannot determine

Show your work here

3

If f(x) = 3x + 10, what is f(1)?

𝑓
A.8
B.30
C.19
D.13

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4

If input 1 → output 3, input 2 → output 6, what is the function rule?

🔄
A.15
B.3x
C.16
D.23

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5

If f(x) = 2x + 6, what is f(4)?

𝑓
A.14
B.15
C.5
D.21

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6

If input 1 → output 4, input 2 → output 8, what is the function rule?

🔄
A.23
B.4x
C.8
D.29

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7

Do these pairs represent a function? (1→2, 2→4, 3→6)

✓
A.Yes
B.No
C.Sometimes
D.Cannot determine

Show your work here

8

Do these pairs represent a function? (1→2, 2→4, 3→6)

✓
A.Yes
B.No
C.Sometimes
D.Cannot determine

Show your work here

9

If input 1 → output -4, input 2 → output -3, what is the function rule?

🔄
A.x - 5
B.19
C.18
D.3

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10

If input 1 → output 2, input 2 → output 3, what is the function rule?

🔄
A.21
B.20
C.22
D.x + 1

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