The set of ordered pairs below represents a function.
 (5,8) , (-8,1) , (15,-4), (-1,16), (17,7)
 Mariela claims that she can add any point to the set and it will still represent a function.
 Which of the following points can be used to show that Mariela's claim is incorrect?
 Select all that apply.
 (1,1)
 (-8,6)
 (17,-3)
 (-5,8)
 (-1,-16)