Functions Worksheet

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Functions Worksheet

Grade: grade8Date: 9/8/2026Problems: 10
1

If f(x) = 5x + 5, what is f(7)?

𝑓
A.28
B.21
C.40
D.23

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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

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3

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

🔄
A.17
B.8
C.16
D.x - 4

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4

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

🔄
A.4x
B.13
C.11
D.5

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5

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

🔄
A.25
B.4x
C.18
D.4

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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) = 1x + 6, what is f(9)?

𝑓
A.15
B.6
C.3
D.1

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8

If f(x) = 2x + 10, what is f(4)?

𝑓
A.17
B.20
C.18
D.30

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9

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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10

If f(x) = 5x + 6, what is f(8)?

𝑓
A.7
B.2
C.14
D.46

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