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1.
Domains are -5, 13, 9, 0.
Ranges are 13, 1, 1, 2.
It is A FUNCTION. Happy Face.
2.
Domains are 2, 3, 4, -2.
Ranges are 1, 8, 6, 6.
It is A FUNCTION. Happy Face.
3.
Domains are 0, 0, -7, -9.
Ranges are 18, 1, 2, 10.
It is NOT A FUNCTION. Sad Face.
Explanation :
- Domains are the first number in a pair.
- Ranges are the second number in a pair.
- If one of the domains were repeated, then it is NOT a function.
- If one of the ranges were repeated or if none is repeated, then it is A function.