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$,6,2,0,7],[$Output$,7,-5,14,7]]$

$\backslash$table$[[$Input$,-3,7,2,7],[$Output$,-1,4,12,13]]$

$\backslash$table$[[$Input$,0,9,0,2],[$Output$,-2,4,3,1]]$

$\backslash$table$[[$Invut$,2,-2,1,2]]$