Question

Which of the following is not a function?

1. {(0,0), (1,4), (2,8) }
2. {(0,0), (3,16), (16,49) }
3. {(1,1), (2,2), (3,3), (4,4)}
4. {(7,1),(6,2), (5,3), (5,4)}
5. all of the choices are function

Answer 1

The Answer is 4.
A Function would have X values that are not the same to each other. While in answer choice 4, X value has two 5s. Which means number 4 is not a function.

Answer 2

4.
A non function is when xs repeat… the x is repeat which is 5