Function vs Non Function

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

• x value repeats

• y value repeats

• x value repeats and has different y values

• y value repeats and has different x values

Is this set of ordered pairs a function and how can you tell?

• Yes its a function because no y values repeat

• No it's not a function because there are negative numbers

• No it isn't a function because an x value repeats but has different y values 

• No it isn't a function because an y value repeats but has different x values

Which of the following guarantees a set of ordered pairs will not be a function?

• An x value repeats

• A y value repeats

• An x value repeats and has different y values

• A y value repeats and has different x values

Is this mapping a function and how can you tell?

• Yes its a function cause all the numbers have lines

• No it's not a function because there a 5 in both ovals

• No it's not a function because the x value 5 has y values of  2 & 9

• No it's not a function because the y value 5 has x values of  2 & 9

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 

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

Does this mapping diagram represent a function?

• No, because there are repeating input values

• Yes, because there are no repeating input values

Which graph does NOT pass the vertical line test?

• Graph 1

• Graph 2

• Graph 3

• Graph 4

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.