Algebra 1 Unit 2 Retest

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

• Function
• Not a Function 

Is this graph a function or not a function? 

• Function 
• Not a Function

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)

• Function
• Not a Function

• Function
• Not a Function

• Function
• Not a Function

Is it a function?

• It IS a function.

• It IS NOT a function

Does this mapping diagram represent a function?

• No, because an input value goes to multiple output values
• Yes, because each input goes to one and only one output

Is this mapping a function or not a function? 

• Function
• Not a Function 

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.