Question

A cell phone company charges by the minute (and partial minute) for making phone calls. Arionna’s plan includes 300 minutes in the $20 monthly base cost. If she uses more than 300 minutes in a month, there is a $5 overage fee and an additional charge of $0.25 per minute. Which graph represents the monthly cost, y, in dollars for making x minutes of calls?

Answer 1

Answer:

A

Step-by-step explanation:

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Answer 2

Answer: The cell phone charge is given by :

y = 20  for 0 ≤ x ≤ 300

y = 0.25x - 50  for x > 300

Step-by-step explanation:

Cell phone charge will be marked on y-axis and minutes on x-axis

When minutes are less than 300 , charge = 20 $

When minutes are ≥ 300 , charge = Base cost + overage fee + additional charge

When minutes are ≥ 300 , charge = 20 $ + 5 $ +  0.25(Total minute -300)

When minutes are ≥ 300 , charge =  (0.25 ×Total minute) - 50

Therefore,

y = 20  for 0 ≤ x ≤ 300

y = 0.25x - 50  for x > 300

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