The Estimated Number of Computers (In Millions) Connected to the Internet

question 99

Multiple Choice

The estimated number of computers (in millions) connected to the Internet in Europe from 1998 through 2002 is summarized in the accompanying table: (Here, x = 0 corresponds to the beginning of 1998.)
Find an equation of the least-squares line for these data. Use the result to estimate the projected number of computers connected to the Internet in Europe at the beginning of 2004, assuming the trend continues.

• A) y = 12.1x + 21.06; 94.030 million computers
• B) y = 12.2x + 20.94; 94.140 million computers
• C) y = 12.1x + 21.06; 93.660 million computers
• D) y = 12.2x + 20.94; 93.910 million computers

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Definitions:

D'Arsonval Shunt

A D'Arsonval shunt is a precision resistor used in conjunction with a D'Arsonval meter movement to allow the measurement of high currents by diverting some of the current away from the sensitive galvanometer coil.

Contact Resistance

The resistance to the flow of electricity encountered at the point where two conductive surfaces meet or connect.

Typical Impedance

A standard or average measure of the total resistance faced by current in an electrical circuit, combining both resistive and reactive elements.

Nonconductive

A property of a material that does not allow electric current to flow through it easily.