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Writing and Solving Linear Equations from Context A linear model is a linear equation that represents a real-world scenario. You can write the equation for a linear model in the same way you would write the slope-intercept equation of a line. The y-intercept of a linear model is the quantity that does not depend on x. The slope is the quantity that changes at a constant rate as x changes. The change must be at a constant rate in order for the equation to be a linear model. 1 Quiz #5 • • • • Checking solutions of systems of equations Solve systems of equations by graphing Solve systems of equations by substitution Linear equations in context 2