Solve the problem.Using a phone card to make a long distance call costs a flat fee of $0.67 plus $0.25 per minute starting with the first minute. What is an equation of the form y = ax + b for this situation?
A. y = 0.25x
B. y = 0.67x
C. y = 0.67x + 0.25
D. y = 0.25x + 0.67
Answer: D
Mathematics
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