$\"\"$

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(a)

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The table shows the quantities $\"\"$ of personal computers shipped and the value $\"\"$ of these shipment.

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Observe the table.

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Find the equation of $\"\"$ using excel sheet method.

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Graph :

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1) Plot the points of quantity $\"\"$ .

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2) Use excel method to find the cubic equation.

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$\"\"$

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Therefore the cubic equation for $\"\"$ is $\"\"$ .

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Find the equation of $\"\"$ using excel sheet method.

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Graph :

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1) Plot the points of quantity $\"\"$ .

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2) Use excel method to find the cubic equation.

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$\"\"$

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Therefore the cubic equation for $\"\"$ is $\"\"$ .

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$\"\"$

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(b)

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Graph :

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Graph the function $\"\"$ .

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The cubic equation for $\"\"$ is $\"\"$ . \ \

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$\"\"$

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Graph :

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Graph the function $\"\"$ .

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The cubic equation for $\"\"$ is $\"\"$ .

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$\"\"$

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$\"\"$

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(c)

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Find $\"\"$ .

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$\"\"$

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Graph :

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Graph the function $\"\"$ .

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$\"\"$

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$\"\"$ represents the average value (in billions of dollars) per million personal computers.

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$\"\"$

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(d)

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Intepret $\"\"$ .

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$\"\"$ is the rate of chage of $\"\"$ with respect to $\"\"$ .

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$\"\"$ represents the rate of change in average value (in billions of dollars) per million personal computers for a given time $\"\"$ .

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$\"\"$

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(a)

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$\"\"$ .

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$\"\"$ .

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(b)

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Graph of the function $\"\"$ .

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$\"\"$

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Graph of the function $\"\"$ .

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$\"\"$

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(c)

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$\"\"$ .

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$\"\"$

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$\"\"$ represents the average value (in billions of dollars) per million personal computers.

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(d)

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$\"\"$ represents the rate of change in average value (in billions of dollars) per million personal computers for a given time $\"\"$ .