Answer:
The top right and left are function. The top middle is not.
The bottom left is not a function and the bottom middle and bottom right are functions.
Explanation:
To be a function every input can only have one output.
The top middle is not a function because the input -7 cannot have an output of 5 and 4.
the bottom right is not a function because the input-3 cannot have the output 11 and 19.