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7 May, 04:38

Which relation is a function?

A. x y

4 - 2

5 - 3

6 - 2

7 - 3

B. x y

3 10

2 20

3 30

4 40

C. x y

-5 2

-5 3

-10 4

-10 5

D. x y

10 15

20 25

8 30

20 35

+2
Answers (1)
  1. 7 May, 05:19
    0
    A function cannot have the same value of x associated with different values of y.

    Think about the straight line test!

    The answer is a.
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