Identifying Functions, Domain, Range, and Independent Dependent Variables

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

A relation where every input in matches with exactly one output is called what?

• Relation
• Linear
• Exponential
• 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

Which of the following statements are true?
I) Ordered pairs represent a relation
II) The independent variable is used for the domain
III) The range is represented by the first number in an ordered pair
IV) In a function each range value is paired with exactly one domain value

• I 
• III
• I and II
• III and IV

Which of the following statements are true?
I) Any set of ordered pairs is a function
II) All relations are functions
III) The domain is represented by the first number in an ordered pair
IV) The dependent variable in a relation is used for the range

• I 
• III
• I and II
• III and IV

On a graph, which axis shows the independent variable?

• x-axis
• y-axis
• neither
• it changes

On a graph, which axis shows the dependent variable?

• x-axis
• y-axis
• neither
• it changes

Which graph is NOT a function?

• Graph 1
• Graph 2
• Graph 3
• Graph 4

Which graph is a function?

• Graph 1
• Graph 2
• Graph 3
• Graph 4