Respuesta :
Table A only will represent the function out of the given two tables.
What is a function?
A function is defined as the expression that set up the relationship between the dependent variable and independent variable.
Two tables are:-
Table A
Input Output
1 7
2 9
3 9
4 5
Table B
Input Output
6 1
7 3
7 2
8 5
From the given tables we can see that table B is having same input with the different outputs so table A is a function.
To know more about functions follow
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