$\"\"$

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(a).

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The general linear function is $\"\"$ .

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$\"\"$ is the total cost of the function in dollars.

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$\"\"$ is the number of miles driven.

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$\"\"$ is the rent for one day charging.

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Rent of the truck for one day is $ $\"\"$ .

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Number of miles driven is $\"\"$ per mile.

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Total cost : $\"\"$ .

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The function is $\"\"$ .

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$\"\"$

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(b).

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Find the cost of renting the truck for $\"\"$ miles and $\"\"$ miles.

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

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$\"\"$

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The cost of renting is $ $\"\"$ for $\"\"$ miles.

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

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$\"\"$

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The cost of renting is $ $\"\"$ is $\"\"$ miles.

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$\"\"$

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(a)

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The function is $\"\"$ .

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(b)

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The cost of renting is $ $\"\"$ for $\"\"$ miles.

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The cost of renting is $ $\"\"$ for $\"\"$ miles.