Functions vs. Non Functions

Consider the set of ordered pairs.

{(x, 4), (2, y), (3, 3)}

For which values of x and y will this set of ordered pairs represent a function?

• x = 3, y = 5

• x = 3, y = 4

• x = 2, y = 3

• x = 4, y = 2

Look at this equation: y = x³ + 2x + 4

Is this relation a function?

• Yes

• No

Is this graph a function or not a function? 

• Quadratic Function

• Not a Function

• linear function

• cubic function

Is this graph a function or not a function? 

• Function 

• Not a Function

Is this table a function or not a function? 

• Function

• Not a Function 

Give the domain and range. Tell if it is a function.

• D: {-4, -2, 0, 2}
  R: {-2, -2, 1, 1}
  Function

• D: {-4, -2, 0, 2}
  R: {-2, 1}
  Function

• D: {-4, -2, 0, 2}
  R: {-2, -2, 1, 1}
  Not a Function

• D: {-4, -2, 0, 2}
  R: {-2, 1}
  Not a Function

• A
• B
• C
• D

Is this graph a function or not a function? 

• Function

• Not a Function

• A
• B
• C
• D

Which ordered pair below would prevent this table from being a function?

• (10, 10)

• (2, 4)

• (6, 1)

• (-2, 0)