A car has 12,500 miles on its odometer. Say the car is driven anaverage of 40 miles per day. Choose the model that expressesthe number of miles N that will be on its odometer after x days.(a) N1x2 = - 40x + 12,500 (b) N1x2 = 40x - 12,500(c) N1x2 = 12,500x + 40 (d) N1x2 = 40x + 12,500

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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.