The Average Lengths $L$ Of Cellular Phone Calls in Minutes from 1999 to 2004

question 120

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 2015 . Round your answer to two decimal places.

• A) \(4.37\) minutes
• B) \(8.74\) minutes
• C) \(5.37\) minutes
• D) \(3.37\) minutes
• E) \(2.19\) minutes

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Definitions:

Fault Scarps

Steep cliffs or slopes formed by the displacement of the ground surface due to movement along a fault.

Erosion

The process of wearing away rocks and soil by water, wind, or ice, often shaping the Earth's surface.

Deformation

The alteration of the shape or size of rocks and geological structures, often under the influence of tectonic forces.

Metamorphism

The process by which a rock's structure or mineral composition is transformed by heat, pressure, or chemical reactions.