Introduction to Functions

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

All of the x values or inputs are called what?

• Domain
• Range
• Relation
• Function

All of the y values or outputs are called what?

• Domain

• Range

• Relation

• Function

If my function rule is y=x + 3, what is the OUTPUT if the input is 4?

• 4

• 3

• 7

• 10

For the function y=x+1 what is the range if the domain is 0,1,2

• 0,1,2

• 1,2,3

• 2,4,6

• 1,1,2

Is the relation a function? Why.

• Yes, because the x-value 11 has two y-values pair with it.
• Yes, because each x-value has only one y-value paired with it.
• No, because the x-value 11 has two y-values pair with it.
• No, because each x-value has only one y-value paired with it.

Is this graph a function or not a function? (Use the vertical line test)

• Function

• Not a Function

Is this graph a function or not a function? (Use the vertical line test)

• Function

• Not a Function

• Function
• Not a Function

Is this mapping a function or not a function? 

• Function
• Not a Function