Answer:
C yes, one to one
Step-by-step explanation:
for every different value of age there is one specific function result.
f(age) = summer camp group, age in N, 6 <= age <= 8
this function is therefore not defined for ages outside of that interval, or if not natural numbers.
under these criteria every allowed value of age has a different calculated summer camp group. no two values of age have the same result as summer camp group.
therefore, it is a one-to-one function.