Determine It Is 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.

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)

Is this graph a function or not a function? 

• Function

• Not a Function

Is this graph a function or not a function? 

• Function

• Not a Function

Determine if the graph is a function. `​ (a)   `

• Not a Function

• Function

Does the mapping of these points represent a function? (Note: the left oval represents your x values and the right oval represents your y values)

• Function

• Not a Function

Determine if the graph is a function. `​ (a)   `

• Not a Function

• Function

• the graph does not represent y as a function of x

• the graph represents y as a function of x

Determine if the graph is a function. `​​ (a)   `

• Function

• Not a Function

The following mapping is​ ​ (a)   because ​ ​​ ​ (b)   .

• both a function and one-to-one

• neither the x's or y's repeat

• not a function

• each output maps to exactly one input

• a function

• each input maps to exactly one output.