Answer:
(C) II and III only
Step-by-step explanation:
Given
Required
Which is a function?
A relation is of the form
Where and
And for a relation to be regarded as a function, all its x values must be unique. i.e. unrepeated.
Analyzing the options
This is not a function because 0 in multiple times for different y values (range)
i.e. (0,0), (0,1) and (0,2)
This is a function because each of the x values (domains) are unique for different y values (range)
This is a function because each of the x values (domains) are unique for different y values (range)
This is not a function because 1 in multiple times for different y values (range)
i.e. (1,2) and (1,3)