Relationships Between Functions

• Function
• Not a Function

Which statement best describes the relationship between x and y in the table?

• Proportional

• Not Proportional

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

Andrew plotted a set of points on the coordinate grid shown below. Which of the following points could be removed so that Andrew’s graph represents a function?

• (-4, -3)

• (-2, 1)

• (0,0)

• (2, -2)

The graph below represents y, the cost in dollars of x pounds of salad at a salad bar. What is the unit rate for the cost of a salad at the salad bar?

• $.50 per pound

• $1.00 per pound

• $2.00 per pound

• $4.00 per pound

Function or not a function?

(-2,2) (-3,4) (-4,5) (-2,6) (-3,7)

• Yes

• No

• Domain: 5, 6

  Range: 3,4,4,5

  Function : NO

• Domain: 5, 6, 7, 9

  Range: 3,4,4,5

  Function : YES

• Domain: 5, 6, 7, 9

  Range: 3,4,4,5

  Function : YES