Question

Question in Comments!
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Answer 1

1 - a. A function
b. Not a function

2 - a. ( -2,7 )
b. ( 1,3 )

3 - a. x-value
b. y-value


4 - a. -2
b. 1
c. -2 or 1
d. 3 or 5
e. 5 or 7

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Answer 2

OK I think...

1 - a. A function
2 - a. ( -2,7)
3 - a. x-value
4 - c. -2 or 1

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Answer 3

@jagr2713