The domain of the function is all the values from which the functio can be mapped: here it's between 0 and 76,867 -depending on how many people come
\(0 \leq x\geq 76867\)
The range is all the values that the function can have.So here it's from 0, when noone is coming, to 76867*161=12377036
\(0 \leq y\geq 12377036\)