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OpenStudy (anonymous):
Pauline's cell phone bill is $39.99 a month for a fixed amount of minutes. For any minute she goes over the allowed amount, she is charged $0.50 per minute. The equation y=39.99+0.50x represents her phone bill, where y is the total bill and x is the number of minutes. Which variable is the independent variable? A. x B. y C. There is no relationship between the variables.
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