Defining Functions

Is the relation a function?{(1,5),(1,7),(3,9),(4,11)}

• Yes
• No

Which is used to determine if a relation is a function?

• 3d line test
• diagonal line test
• horizontal line test
• vertical line test

Is the graph pictured a function?

• Yes
• No

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)

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

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 a function?

• Function
• Not a Function

Is this mapping diagram a function?

• Function
• Not a Function

Is this graph a function?

• Function
• Not a Function

Is this mapping a function or not a function? 

• Function
• Not a Function