The tables where the output is a function of the input are:
First table, third table, and fifth table.
Which of the tables represents a function?
A function is a relation that maps elements from a set (inputs) into another set (output). Such that each input can be only mapped into a single output.
For example, if you look at table 2, you can see that input 4 is mapped into two different outputs, then this is not a function.
Similar for table 4, input 3 is being mapped into two different outputs.
Then these two tables do not represent functions.
Then the tables where the output is a function of the input are:
First table, third table, and fifth table.
If you want to learn more about functions, you can read:
https://brainly.com/question/4025726