Final answer:
The question pertains to calculations for excess cell phone usage and credit card late payment fees, where 'X' represents the excess time for individual customers and fees include a $10 late charge plus $5 daily.
Step-by-step explanation:
The subject matter concerns the calculation of fees based on excess usage of cell phone services and late payment charges by a credit card company. When considering an INDIVIDUAL cell phone customer's excess time related to their contract, X represents the amount of time they have gone over their allowance. For a sample of 80 customers who exceed their contract time allowance, one could analyze the data to determine the additional charges incurred.
The fees associated with late credit card payments are structured such that a flat rate of $10 is charged initially for a late payment, with an additional $5 daily charge being applied for each day the payment remains overdue. This information provides the basis for calculating the total late payment charges that a customer might incur if they fail to pay their credit card bill on time.