Intro to Functions

Intro to Functions

In a function, each input(x) has exactly one output(y).

x CANNOT repeat

Multiple Choice

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

Multiple Choice

All of the x values or inputs are called what?

• Domain
• Range
• Relation
• Function

Multiple Choice

All of the y values or outputs are called what?

• Domain
• Range
• Relation
• Function

Ask: Is each x used just once?

• Yes - it is a function

• No, x repeats, it is NOT a function

Multiple Choice

Is this set of ordered pairs a function or not a function? 

• Function
• Not a function

Multiple Choice

Is this set of ordered pairs a function or not a function? 

• Function
• Not a Function 

Multiple Choice

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)

Multiple Choice

Is this mapping a function or not a function? 

• Function
• Not a Function

Multiple Choice

Is this mapping a function or not a function? 

• Function
• Not a Function 

Multiple Choice

Is this graph a function or not a function? 

• Function
• Not a Function

Multiple Choice

Is this graph a function or not a function? 

• Function
• Not a Function

Multiple Choice

• Function
• Not a Function

Multiple Choice

Does this table represent a function?

• Yes 
• No

Multiple Choice

Is this table a function or not a function? 

• Function
• Not a Function 

Poll

Can you identify if a relation, table or graph is a function?

• Absolutely!

• Probably

• Maybe?

• What?