Answer:
Explanation:
The following are relations which are also functions.
{(1,1), (2,2), (3,3)}
{(1,1), (2,1), (3,1)}
{(1,2), (2,3), (3,2)}
A function is a relation between elements of 2 sets, where the element of the 1st set can only be assigned once to the 2nd set.
for example:
A = {a, b, c}
B = {x, y, z}
the following pair is considered if the element of set A is only assigned with 1 element of set B.
i.e:
1 can only be either assigned to x, y or z
2 can only be either assigned to x, y or z
3 can only be either assigned to x, y or z