Final answer:
The shipping cost is a function of the weight of the package, meaning the shipping cost can be predicted based on the package’s weight. So, the correct option is C. The shipping cost is a function of the weight of the package.
Step-by-step explanation:
The correct answer to the student's question regarding the functional relationship shown in the graph is: C.
The shipping cost is a function of the weight of the package.
This means that for each weight, there is a specific shipping cost associated with it.
In a functional relationship, one variable (the dependent variable) is determined by the other variable (the independent variable).
In this context, the shipping cost can be predicted based on the weight of the package, which makes the weight the independent variable and the cost the dependent variable.
Therefore, the correct option is C. The shipping cost is a function of the weight of the package.