Question

Which of the following relations represent a function?

{(-1,-3),(3,2),(3,7)}
{(-3,7),(3,-7),(3,7)}
{(-1,4),(-1,7),(3,5)}
{(-1,4),(2,7),(3,7)}

Answer 1

{(-1,4), (2,7), (3,7)} is the answer.

Hope it helped and God Bless You <3

Answer 2

{(-1,4), (2,7), (3,7)} is a function

Explanation:

For something to be a function, any given x must have one and only one y

{(-1,-3), (3,2), (3,7)}

-1(x) only has -3(y)

3(x) has 2(y) and 7(y), making it not a function

{(-3,7), (3,-7), (3,7)}

-3(x) only has 7(y)

3(x) has -7(y) and -7(y, making it not a function

{(-1,4), (-1,7), (3,5)}

3(x) only has 5(y)

-1(x) has 4(y) and 7(y), making it not a function

{(-1,4), (2,7), (3,7)}

-1(x) only has 4(y)

2(x) only has 7(y)

3(x) only has 7(y)

This is a function