A movie service charges an initial fee of $6.50 and then an additional monthly fee. The table displays the total cost of this service in two-month increments. Which of the equations below could be used to best represent the relationship presented in the table? y = 0.5x + 0   y = 0.5x + 6.50   y = 2x + 0   y = 2x + 6.50

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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.