Question

Determine whether each relation is a function. Explain as well please.

1. (5,5),(6,2),(8,4)
2. (7,3),(7,9),(9,6)
3. (5,5),(5,6),(5,2),(7,5),(8,8)
4. (6,6),(5,6),(7,7),(8,7)

Answer 1

1) yes, because no x values repeats itself

2)no, because an x value repeats itself (7)

3)no, because an x value repeats itself (5)

1) yes, because no x value repeats itself