The average value of a certain type of automobile was $13,500 in 1993 and depreciated to $7320 in 1996. Let y be the average value of the automobile in the year x, where x = 0 represents 1993. Write a linear equation that models the value of the automobile in terms of the year x.

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Q: When we can say an equation is linear?

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Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.