Key Idea: Model

A model is an equation or function that represents a real-world situation.

General Rule:

• Variables represent quantities in the situation.

• Constants or coefficients define relationships or rates.

• The model can be used to predict, analyze, or describe the scenario.

Why this matters for the SAT:

Models appear in word problems, data interpretation, and function analysis. Understanding that an equation represents a situation allows you to translate real-world problems into solvable math expressions.