Answer:
- Grade
- Hours Studied
Explanation:
You want to know the meaning of the first and second values in the ordered pairs that represent the relation shown in the diagram.
Ordered pair
The ordered pairs representing a relation are understood to be ...
(first value, second value) = (input value, output value)
= (value at arrow tail, value at arrow head)
The diagram labels the ends of the arrows as "Grade" and "Hours Studied." That tells you the values mean ...
first value: Grade
second value: Hours Studied