Look at this mapping diagram:
Domain
Range
–15
8
16
16
15
20
Is this relation a function?
If the two columns are supposed to be
-15 8
16 16
15 20
then yes, since each domain element is used only once.
Same for
-15 16
8 15
16 20
Domain
Range
–15
8
16
16
15
20
Is this relation a function?
-15 8
16 16
15 20
then yes, since each domain element is used only once.
Same for
-15 16
8 15
16 20