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21 questions
Is this a function or not?
Function
Not a Function
Is this a function?
Yes
No
Let me ask my dog...
Why are there letters in math?
Is this a function?
Yes
No
I'm Confused
May I phone a friend?
Which set of values is not a function?
(9,5) (10,5) (4,-5) (8,-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)
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