In which of the relations represented by the tables below is the output a function of the input?

Select all correct answers.

Select all that apply:

$\backslash$table$[[$Input$,-2,9,-5,9],[$Output$,7,0,9,3]]$

$\backslash$table$[[$Input$,-5,8,-2,2],[$Output$,3,0,-4,-4]]$

$\backslash$table$[[$Input$,-4,-2,3,6],[$Output$,6,5,6,8]]$

$\backslash$table$[[$Input$,-2,9,-4,9]]$