Functions Worksheet

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Functions Worksheet

Grade: grade8Date: 5/20/2026Problems: 10
1

If f(x) = 1x + 2, what is f(4)?

𝑓
A.26
B.30
C.23
D.6

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2

If f(x) = 2x + 7, what is f(10)?

𝑓
A.27
B.9
C.11
D.15

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3

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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4

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

🔄
A.18
B.9
C.6
D.x - 3

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5

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

🔄
A.3x
B.17
C.2
D.3

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6

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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7

If f(x) = 3x + 7, what is f(2)?

𝑓
A.18
B.13
C.16
D.24

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8

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

🔄
A.30
B.4x
C.17
D.10

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9

If f(x) = 1x + 7, what is f(2)?

𝑓
A.5
B.26
C.9
D.14

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10

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

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