Back to Functions — Problem 1 · Task Set 35

8.F Tutor Intake — Functions: Define, Compare, and Model

This short check helps your tutor understand where to start. Answer each question without help. If you're not sure, give your best try — the goal is to find what to work on together, not to grade you.

Grade 8·13 problems·~13 min·Common Core Math - Grade 8·domain·f

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Concepts

A function is a rule that assigns to each input exactly one output.
Which of the following relationships, given as a set of (input, output)
pairs, is NOT a function?

{(1, 4), (2, 7), (3, 4), (5, 9)}

{(0, 5), (1, 5), (2, 5), (3, 5)}

{(2, 3), (4, 6), (2, 8), (5, 1)}

{(1, 2), (3, 6), (4, 8), (6, 12)}