The Average Lengths L of Cellular Phone Calls in Minutes

question 89

Multiple Choice

The average lengths L of cellular phone calls in minutes from 1999 to 2004 are shown in the table below. Use the regression feature of a graphing utility to find a linear model for the data. Let t represent the year, with t = 9 corresponding to 1999. Use the model to predict the average lengths of cellular phone calls for the year 2012. Round your answer to two decimal places.

• A) 5.00 minutes
• B) 8.00 minutes
• C) 4.00 minutes
• D) 2.00 minutes
• E) 3.00 minutes

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Definitions:

Sales Collection

The process of receiving payment from customers for goods or services sold, improving cash flow and liquidity.

Operating Expenses

Regular expenses associated with the operation of a business, such as rent, utilities, and payroll, not directly tied to production.

Cost of Sales

The immediate expenses related to the manufacturing of products sold by a business, encompassing costs for materials and labor.

Cash Receipts

Money received by a business during a particular period, including revenues from sales and other transactions.