Domain & Range are other terms for X&Y. The answer isn't A, because reciprocal means opposite. The answer isn't B, because function is when the y values do not repeat in a pattern. The answer isn't D, because an independent value is X.
The answer is C, Range is another term for a y value.
How many students would there be? did not see that information if that is the question but if not I say go with the bus that has more seats yes it is more expensive but more space is better!