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milliex51

The cost in dollars, C(d), to rent a houseboat during July to August from a certain company is given by C(d) = 120d + 100, where d is the number of rental days. a) Why does the 100 represent the fixed cost and the independent variable of the number of days? b) State the domain and range: Why is the domain: 0 ≤ d ≤ 62, range: 100 ≤ C ≤ 7540?

  • 2 years ago
  • 2 years ago

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  1. liliy
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    a) independent means that it will not be changed no matter what, so in every case no matter how many days you rent it. you will always have to add 100 . that is why its independent.

    • 2 years ago
  2. milliex51
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    Because when I graphed the function it is no where 62 and 7540. But I do know that from July to Agusut = 62 days and 120(62)+100 = 7540.

    • 2 years ago
  3. milliex51
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    ohh, i see.

    • 2 years ago
  4. liliy
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    july and aug have 31 days each so together its 62 days. so you can rent for a range between 0 adn 62 days.when you plug in those numbers you get the y values

    • 2 years ago
  5. milliex51
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    what do you mean when I plug in those numbers?

    • 2 years ago
  6. liliy
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    well in a simple equation we have y=x+.... so the 0 to 62 are the numbers you would put in for the x and finish the equationto find the range of the y.

    • 2 years ago
  7. milliex51
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    i still don't get it :(

    • 2 years ago
  8. liliy
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    in your equation:C(d) = 120d + 100, the d is the"x" and the C(d) is the y. so when you put in 0 you have C(d)=120*0+100. and you get C(d)=100. then plug in 62 day.: C(d)=120*62+100.cC(d)=7540::) so the smallest amoiunt was 100 and the largest amount was 7540

    • 2 years ago
  9. milliex51
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    ohhhh, i see. But how about x?

    • 2 years ago
  10. liliy
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    so x represnts thedays you can rent. as i said before:how many days can someone rent?

    • 2 years ago
  11. milliex51
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    62 days so from 0 to 62?

    • 2 years ago
  12. liliy
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    yup

    • 2 years ago
  13. milliex51
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    ohh, thank you :)

    • 2 years ago
  14. liliy
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    np

    • 2 years ago
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