Answer:
Model is the required word.
Step-by-step explanation:
Given : A function which is used to represent a problem, and which can be used to solve the problem.
We have to find : The given situation is called?
Solution :
A function which is used to represent a problem gives you a model .
As model is the representation of a problem which is used to solve a problem.
So, according to hint also the required word is model.
A function which is used to represent a problem, and which can be used to solve the problem, is called a model.
Example: If a company produces x units of an item at a cost of $35 apiece, the function C = 35x is a model of the total production cost.