Select is a function or is not a function to correctly classify each relation.
title
is a function
is not a function
{(3, 7), (3, , , 7)}
{(1,5), (3, , 6), (6,4)}
{(2, , 2), (4, 6), (5,8)}
{(0,4), (3, , 2), (6,5)}

See explanation below.

Step-by-step explanation:

Define each relation as a function or not a function:

{(3, 7), (3, 6),(5, 4),(4, 7)} - is not a function  because there are two answers for the same input, which is 3. One time the output is 7 and another time the output is 6.

{(1,5), (3, 5),(4, 6), (6,4)}  - is a function

{(2, 3),(4, 2), (4, 6), (5,8)}  - is not a function because there are two answers for the same input, which is 4. One time the output is 2 and another time the output is 6.

{(0,4), (3, 2),(4, 2), (6,5)} - is a function

Any time that the same x input can generate different outputs, then the relation is not a function. There must be a unique output for every input.

Hope this helps! have an Awesome Day!! :-)

step-by-step explanation:

you can add the two numbers and divide the result by 2. or you can find the gap between the two numbers and add half of this to the smaller number.