In a science experiment, the temperature of a substance is changed from 42 °F to -54 °F at an average rate of -12 degrees per hour. Over how many hours does the change take place? Which statement best represents the distance on a number line between -14 and -5? A) -14 - (-5) B) -14 + (-5) C) -5 - (-14) D) -5 + (-14) On a 4 1/2 hour trip, Christopher drove 2/3 of the time. For how many hours did Christopher drive?

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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.