$\"\"$

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(a)

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The function $\"\"$ represents the value of the computer after $\"\"$ years.

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$\"\"$ represents the original value of the computer.

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Original value of the compute: $\"\"$ .

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$\"\"$ at $\"\"$ , hence the point on the graph of the function $\"\"$ is $\"\"$ .

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Company depreciate the computer using straight line method for 3 years

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then $\"\"$ , hence the point is $\"\"$ .

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Consider the two points $\"\"$ and $\"\"$ .

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The Slope of the function $\"\"$ is $\"\"$ .

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The general form of linear function is $\"\"$ , where $\"\"$ is the $\"\"$ -intercept.

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From the point $\"\"$ , the value of $\"\"$ .

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The function is $\"\"$ .

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$\"\"$

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(b).

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The function is $\"\"$ .

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The age of the computer cannot be negative and the value of the computer is

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dpreciated after $\"\"$ years.

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The domain of the function is $\"\"$ or $\"\"$ .

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$\"\"$

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(c)

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Graph:

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The function is $\"\"$ .

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The Slope of the function is $\"\"$ .

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From part(a), consider the point $\"\"$

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The point is $\"\"$ , move the point $\"\"$ untis upward and $\"\"$ unit right to the point $\"\"$ .

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$\"\"$

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$\"\"$

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(d).

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Find the book value of the computer after $\"\"$ years.

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Substitute $\"\"$ in the function $\"\"$ .

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$\"\"$

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The computer have a book value of $\"\"$ after $\"\"$ years.

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$\"\"$

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(e).

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Find the number of years when the book value is $ $\"\"$ .

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Substitute $\"\"$ in the function $\"\"$ .

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$\"\"$

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After $\"\"$ year, the book value of the computer is $ $\"\"$ .

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$\"\"$

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(a) The function $\"\"$ .

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(b) The domain of the function is $\"\"$ or $\"\"$ .

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(c) Graph the function for $\"\"$ .

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$\"\"$

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(d) The computer have a book value of $ $\"\"$ after $\"\"$ years.

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(e) After $\"\"$ year, the book value of the computer is$ $\"\"$ .