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Serga [27]
3 years ago
5

20 POINTS FOR YOUR TIME! PLEASE HELP!!

Mathematics
1 answer:
zheka24 [161]3 years ago
3 0
For a relation to be function, every x value should have its unique image in    co-domain. If x is related to more than one y value, then that relation is not a function 
In 1, as you can see, 1 related to -7 as well as 8. Which means 1 has two images viz. -7 and 8. But for a relation to be function, x should have only one image. Thus, it is not a function.
The worst is the 4th one in which -2 has 4 images. 
Therefore, only relation B is a function.
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