Answer:
1) x 1 −1 4 −4
y 8 8 10 10
Step-by-step explanation:
x 1 −1 4 −4
y 8 8 10 10
When each input in set x has exactly one output in set y, the relation is a function.
ALL OF THESE ARE NOT FUNCTIONS !!!!!!!!!!
x 2 2 3 3 number 2 has 2 different outputs → not a function
y 6 −6 7 7
x 5 −5 5 −5 number 5 and -5 have 2 different outputs → not a function
y 10 11 12 13
x 2 2 7 7 2 and 7 have 2 different outputs → not a function
y 2 3 4 5
