What are Models?

We frequently used the term “Models” in ML. like Linear Regression Model etc. Can anybody help me in understanding What actually a Model is? How do you define a Model to a layman?

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It’s called a model because it creates a method for making predictions of the behavior of a system, based on training using examples of the system’s behavior.

In practice, a model consists of a set of mathematical equations, where the weight assigned to each term in the calculation is learned based on minimizing the errors between predictions and observations from the training data.

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