Question

Determine if the given relation is function or not. Give its domain and

range.
{(1, 6), (2, 7), (3, 8), (4, 9)}

Answer 1

Given relationship

• (1,6)
• (2,7)
• (3,8)
• (4,9)

Domain:-

• {1,2,3,4}

Range:-

• {6,7,8,9}

As every domain has an unique range it's a function

Answer 2

• Yes

Explanation:

According to definition of the function, it should have one-to-one relation.

We can see all pairs are unique, no repeated ranges for same domain.

Yes, this is a function.