Answer:
FIRST OPTION.
SECOND OPTION.
FOURTH OPTION.
Step-by-step explanation:
By definition, a relation is a function if an only if each input value ( each x- value) has only one output value (y-value).
Based on this you can identify that:
1. The relation [tex](8,7), (7,8), (6,5), (5,6)[/tex] is a function.
2. The relation [tex](-2,7), (-3,9), (-5,9), (-8,11)[/tex] is a function.
3. The relation [tex](6,-6), (-3,12), (6,-1), (-8,13)[/tex] is not a function, because the input value 6 has two different output values:
[tex]x=6,y=-6\\\\x=6,y=-1[/tex]
4. The first table represents a function.
5. The second table does not represent a function, because the input value 0 has two different output values:
[tex]x=0,y=0.5\\\\x=0,y=2[/tex]
