4. The total cost, T, in dollars, for renting a car from a car rental service is a function of d, the number of days the car is rented, and k, the total kilometers driven: T=r(d, k) = 75 + 20d + 5k. (a) Is r a linear function? (b) Provide units for the coefficients of d and k, and interpret them in terms of the rental costs. (c) Explain the significance of the intercept 75 as a cost. (d) Calculate r(4, 300) and interpret your answer.
4. The total cost, T, in dollars, for renting a car from a car rental service is a function of d, the number of days the car is rented, and k, the total kilometers driven: T=r(d, k) = 75 + 20d + 5k. (a) Is r a linear function? (b) Provide units for the coefficients of d and k, and interpret them in terms of the rental costs. (c) Explain the significance of the intercept 75 as a cost. (d) Calculate r(4, 300) and interpret your answer.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Transcribed Image Text:4. The total cost, T, in dollars, for renting a car from a car rental service is a function of d, the number
of days the car is rented, and k, the total kilometers driven:
T=r(d, k) = 75 +20d + 5k.
(a) Is r a linear function?
(b) Provide units for the coefficients of d and k, and interpret them in terms of the rental costs.
(c) Explain the significance of the intercept 75 as a cost.
(d) Calculate r(4, 300) and interpret your answer.
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