1. Which relation is a function?

(Points : 4)
{(1, 2); (2, 3); (3, 4); (1, 5)}
{(1, 2); (2, 5); (3, 2); (4, 5)}
{(1, 2); (2, 3); (3, 4); (2, 5)}
{(1, 2); (1, 3); (3, 2); (4, 2)}

Question

1. Which relation is a function?

(Points : 4)
       {(1, 2); (2, 3); (3, 4); (1, 5)}
       {(1, 2); (2, 5); (3, 2); (4, 5)}
       {(1, 2); (2, 3); (3, 4); (2, 5)}
       {(1, 2); (1, 3); (3, 2); (4, 2)}

anonymous · Answer

the one where there is no repeat in the first numbers

anonymous · Answer

relation 2, as all other relations have multiple values of y for a single x

anonymous · Answer

B?

anonymous · Answer

yes

anonymous · Answer

2. What is the range of the relation?

{(1, 2); (2, 4); (3, 1), (4, 3)}

(Points : 4)
       {1, 2, 3, 4}
       {1, 2, 3, 4, 6}
       {2, 4, 6}
       {2, 4}

s3a · Answer

B because a function is a relation where each value of x can only have one value of y.

s3a · Answer

(My answer is to your initial question.)

anonymous · Answer

to the first question?

anonymous · Answer

or the #2?