The Average Lengths L of Cellular Phone Calls in Minutes

question 57

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 2006. Round your answer to two decimal places.

• A) 6.54 minutes
• B) 1.64 minutes
• C) 2.27 minutes
• D) 4.27 minutes
• E) 3.27 minutes

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Definitions:

Output Contracts

Agreements in which a seller agrees to sell all the output of a certain product to a particular buyer.

Requirements Contracts

Contracts where one party agrees to purchase all of its needs for a particular commodity from the other party for a certain period.

Common Law

A body of laws based on judicial decisions and customs, rather than statutory laws passed by a legislature.

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A fair and reasonable value exchanged in a contract, ensuring that all parties receive something of value.