Question

4. Which relation is a function?

A.{(0; -9), (-9, -2), (0, -3)}
B.{(0, -9), (-9,0), (-3, -3)}
C.{(0, -9), (-2, -3), (-2, 0), (-3,-2)}
D.{0,-9, -2, -3}

Answer 1

B ,because a function is where x values do not repeat therefore why it is B

Answer 2

It's B.

Explanation:

That is B because there are no duplicate x-values in the ordered pairs.

D is a set of numbers, not a function.