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4. Graphs and Functions - 3! 2부

4. Graphs and Functions / Function Notation / 문제 7

문제 7

Let $f$ be defined by the set of ordered pairs ${(0, 2), (1, 5), (2, - 1)}$ . What is $f of 1$ ?

A

$negative 1$

B

Undefined

C

$5$

D

$2$