Question

Which relation is a function ?

Answer 1

The correct option has been marked in the Figure below. A function $f$ from a set $A$ to a set $B$ is a relation that assigns to each element $x$ in the set $A$ exactly one element $y$ in the set $B$. The set $A$ is the domain (also called the set of inputs) of the function and the set $B$ contains the range (also called the set of outputs).

For our correct option we have:

Set A, Domain:

Inputs: -2, 1, 0, 1, 2, 3

Set B, Range:

Outputs: -1, 0, 1, 2, 3

This is a function because this is a relation that assigns to each element $x$ in the set $A$ exactly one element $y$ in the set $B$. So, the assignation is as follow:

• -2 (in x) matches to 0 (in y)
• -1 (in x) matches to 3 (in y)
• 0 (in x) matches to 2 (in y)
• 1 (in x) matches to -1 (in y)
• 2 (in x) matches to 0 (in y)
• 3 (in x) matches to 2 (in y)

Answer 2

Answer:

Under neath 1 one

Step-by-step explanation: