Question

Math Homework? As always I'll reward a medal ._.

Determine which relation is a function.

A.
{(–5, 1), (–5, 0), (–2, 1), (–1, 4), (6, 2)}

B.
{(–5, 1), (–2, 0), (–2, 2), (3, 4), (6, 2)}

C.
{(–5, 1), (–2, 0), (–1, 1), (2, 4), (6, 3)}

D.
{(–5, 3), (–2, 0), (–1, 2), (6, 4), (6, 3)}

Answer 1

A function is a relation such that one x-value only corresponds to one y-value.

Answer 2

A function is a graph that doesn't have two y values for one x value.

Answer 3

Right. So a direct answer would be?.....

Answer 4

C but the answer means nothing

Answer 5

Thanks for your help anyway I guess. I'll fan you both. And the medal goes to kenny.

Answer 6

A is not a function because it has two values of y associated with the same value of x: (-5,1) and (-5,0)

B is not a function because it has two values of y associated with the same value of x: (-2,0) and (-2,2)

D is not a function because, well, you know: (6,4) and (6,3)

C is the only one that doesn't fail the function test.

Answer 7

Thank you. A well explained answer :DD