Which representations are functions? table
x y
2 6
3 -12
4 7
5 5
2 -6

(1.1)

(2,1)

(3,2)

(4,3)

(5,5)

(6,8)

(7,13)

1V y=2x+1

a 1 and 11

b 111 on;y

c 11 and 1V

d 1v only

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