Question

For each relationship dexide whether or not it's a function

Answer 1

For each option, we will check it is a function or not

option: 1

Each element of the domain appears one time.

so, option 1 is a function

option 2:

The domain is 3 and connected to all the elements of the range

So, the option is not a function.

option 3:

domain: { y, k, v, j }

So, the option is a function

option 4:

Domain = { -2, -9, -9, 7 }

So, as -9 is exising 2 times

So, it is not a function