Question
A cell phone carrier charges a fixed montly fee plus a constant rate for each minute used. In January, the total cost for 250
minutes was $55 while in February, the total cost for 150 minutes was $53.
Choose the formula below which gives the function C(x) representing the monthly cost, in dollars, of a cell phone using x
minutes.
Select the correct answer below:
C(x) = 0.02x + 50
C(x) = -0.02x + 56
O C(x) =
0.05x + 28
O C(x) = -0.05x + 78
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