functions

What is the definition of function?

• Has inputs and outputs

• Each input has only ONE output

• Inputs have multiple outputs

• x-values and y-values

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

(-2, 3), (0,1), (2, -4), (3, -1), (2, 4)

• Function

• Not a Function

• Function
• Not a Function

Is this mapping 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 mapping a function or not a function? 

• Function
• Not a Function 

Is this is a function or not a function?

• Function
• Not a Function

Which graph does NOT pass the vertical line test?

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

y = 10x
What is y when 
x = 3?

• 13
• 3
• 20
• 30

y = 2x - 9
What is y when
x = 2?

• 5
• 14
• 10
• -5