Function vs Non-Functions

Is this table a function or not a function? 

• Function

• Not a Function 

Which of the following guarantees a mapping will not be a function?

• x value repeats

• y value repeats

• x value has two or more arrows leaving it

• y value has two or more arrows arriving at it

Which of the following best describes a function?

• A special relationship where each x and y are individually paired

• A special relationship where each x value has only one y value 

• A special relationship where each y value has only one x value 

• A special relationship where each the x and y value and always equal 

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)

Look at the graph. Is the relation a function?

• yes

• no

Is this graph a function or not a function? 

• Function

• Not a Function

Is this a function?

• Yes

• No

Is this table a function or not a function? 

• Function

• Not a Function

Is this table a function or not a function? 

• Function

• Not a Function 

Does the graph represent a function?

• Yes, because the vertical line test shows there are no repeating input values

• No, because the vertical line test shows there are repeating input values