Which relations are functions? list the relation number(s) that are function(s) in the answer bank

1. (3, 2), (9, 1), (-4, 7), and (0, -2)

2. (7, 1), (-5, 2), (1, 0), and (-5, 3)

3. (-2, -4), (2, 4), (6, 8), and (-6, -8)

4. (1, 3), (-1, 3), (2, 3), and (-2, 3)

options 1,3,4 are functions.

Step-by-step explanation:

RULE: a relation is said to be a function if every element in the domain ( the numbers in the left side in the below sets) is related to only one number ( number on the right side in the below sets).

Let us check each option one by one:

1.   3           2

    9           1

   -4           7

    0          -2

here each number on the left side is mapped to or is related to one number only.

so this relation is a function

2.  7         1

    -5        2,3

     1         0

here, "-5" is mapped to two different numbers. so this relation is not a function.

3.  -2    -4

    2      4

    6      8

    -6    -8

here each number on the left side is mapped to or is related to one number only.

so this relation is a function

4.  1     3

   -1    3

   2    3

  -2    3

here each number on the left side is mapped to or is related to one number only.

so this relation is a function.

even if it is related to the same number, it doesn't matter.

it should follow the above given rule that's it.

depending on others is critical to survival. my source is apex!

step-by-step explanation: