# How do you find the domain of the function {(3,1), (5,6), (8,-3), (7,-3)}?

Your function appears to be a mapping of 4 $x$ values into 4 $y$ values. Assuming this is what you intended (and it certainly would be valid)
then the domain of the function is the set of $x$ values
$\left\{3 , 5 , 8 , 7\right\}$