Relations and Functions

Which of the relations below is a function?

• {(2, 3), (3, 4), (5, 1), (2, 4)}

• {(2, 3), ( 3, 4), (6, 2), (3, 3)}

• {(2, 3), (3, 4), (6, 2), (7, 3)}

Given the relation A = {(5, 2), (7, 4), (9, 10), (x, 5)}. Which of the following values for x will make relation A a function?

• 7

• 4

• 9

The following relation is a function.

{(10, 12), (5, 3), (15, 10), (5, 6), (1, 0)}

• True

• False

The graph of a relation is shown at the right. Is this relation a function?

• yes

• cannot be determined from the graph

• no

The graph of a relation is shown below. Is the relation a function?

• yes

• cannot be determined from the graph

• no

The graph of a relation is shown below. Is the relation a function?

• yes

• cannot be determined from the graph

• no

Which graph represents a function?

• 
• 
• 
• 

Is this mapping diagram a function or not?

• function

• not a function

Is this table a function or not a function?

• function

• not a function

Is this table a function or not a function?

• function

• not a function