Answer:
Yes, it is a one-to-one function
Step-by-step explanation:
Since, a relation in which each input value has only one output value is called function,
Here, we have given a relation,
In which input value is age of student and output value is student's group,
∵ input = 6, output = group A,
input = 7, output = group B,
input = 8, output = group C,
Thus, each input value has only one output value,
So, the group assignment is a function of age.
Now, in a function if each input has distinct output then the function is called one-one otherwise many-one.
∵ for each age of student there is a different grade.
Hence, it would be one-to-one function.