Solve the problem.When making a telephone call using a calling card, a call lasting 6 minutes cost $2.00. A call lasting 13 minutes cost $3.75. Let y be the cost of making a call lasting x minutes using a calling card. Write a linear equation that models the cost of a making a call lasting x minutes.
A. y = -0.25x + 3.5
B. y = 4x - 22
C. y = 0.25x - 9.25
D. y = 0.25x + 0.5
Answer: D
Mathematics
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C. 
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