A chain-saw rental firm charges $28 per day or fraction of a day to rent a saw,

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A chain-saw rental firm charges $28 per day or fraction of a day to rent a saw, plus a fixed fee of $8 for resharpening the blade. Let S(x) represent the cost of renting a saw for x days. Find the following.

(a) S(1/2)

(b) S(1)

(c) S(1 1/4)

(d) S(3 1/ 2)

(e) S(4)

(f) S(4 1/10)

(g) What does it cost to rent a saw for 4 9/10 days?

(h) A portion of the graph of y = S(x) is shown here. Explain how the graph could be continued.

(i) What is the independent variable?
(j) What is the dependent variable?
(k) Is S a linear function? Explain.

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