David is planning a ski trip. The equation C = 570 + 25g models the relation between the cost in dollars, C, of the ski trip and the number of skiers, g. The slope tells us: If no skiers show up, the ski trip costs $25 For every additional skiers, the ski trip costs an additional $25 O If no skiers show up, the ski trip costs $570 For every additional skiers, the ski trip costs an additional $570

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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.