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Understanding Functions (Set 2) Worksheet

Grade 8 Math · printable worksheet (PDF) with answer key · 14 problems · CCSS 8.F.A.1, 8.F.A.2

A printable grade 8 understanding functions (set 2) practice worksheet with 14 problems and a complete, step-by-step answer key — formatted to print cleanly on standard paper. Included in the one-time $20 unlock for the full NudgeLearn library.

Sample problems

A function assigns exactly one output to each input. Decide whether each relation is a function, evaluate functions at given inputs, solve for an input, and compare functions given in different forms.

1. Does the set of ordered pairs ${(0, 2), (1, 4), (2, 6), (3, 8)}$ represent a function? Explain.
2. Does the set ${(4, 1), (5, 2), (4, 3), (6, 5)}$ represent a function? Explain.
3. Which mapping represents a function?
- $5 \to p, 5 \to q, 6 \to r$
- $5 \to p, 6 \to p, 7 \to q$
- $5 \to p, 5 \to q, 7 \to r$
- $8 \to p, 8 \to q$
4. The function is given by $f (x) = 4 x - 5$ . Find $f (3)$ .

Plus 10 more problems and a full answer key in the PDF.

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