The cost in dollars, y, to participate x days in a bike tour is a linear function. Lou’s bike tour is described by the equation y = 6x + 40. The cost of Mary’s bike tour is $120 for a 14-day bike tour. If both Lou and Mary take 14-day tours, whose bike tour costs less? *

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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.