Math 8 Functions Practice

What is the definition of function?

• Has inputs and outputs
• Every input has only ONE output
• Inputs have different outputs every time
• x-values and y-values

• Function
• Not a Function

Which set of values is a function?

• (9,5) (10,5) (9,-5) (10,-5)
• (3,4) (4,-3) (7,4) (3, 8)
• (6,-5) (7, -3) (8, -1) (9, 1)
• (2, -2) (5, 9) (5, -7) (1, 4)

Is this graph a function or not a function? 

• Function
• Not a Function

Is this graph a function or not a function? 

• Function
• Not a Function

Is this graph a function or not a function? 

• Function 
• Not a Function 

Is this graph 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

All of the y values or outputs are called what?

• Domain
• Range
• Relation
• Function

All of the x values or inputs are called what?

• Domain
• Range
• Relation
• Function