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    A car cost 375 Swedish crowns to rent each day. For that price you can drive 100km. If you drive a longer distance, then there will be an additional cost of 2.5 Swedish crowns per km.

    Which formula describes this the best, where K is dependent on the driven distance x kilometers?

    Is it either:

    1. K = 375 2,5x
    2. K = 375 2,5x 100
    3. K = 375 2,5(x-100)
    4. K = 375

    Or none of them? How do you recognize a formula?

    My guess was (1).

    Also, what is the domain of the function when choosing the formula? Explain please..
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    (Original post by manny103)
    A car cost 375 Swedish crowns to rent each day. For that price you can drive 100km. If you drive a longer distance, then there will be an additional cost of 2.5 Swedish crowns per km.

    Which formula describes this the best, where K is dependent on the driven distance x kilometers?

    Is it either:

    1. K = 375 + 2,5x
    2. K = 375 + 2,5x + 100
    3. K = 375 + 2,5(x-100)

    Or none of them? How do you recognize a formula?

    My guess was (1).

    Also, what is the domain of the function when choosing the formula? Explain please..
    drop the A level my advice lol.....
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    (Original post by Realitysreflexx)
    drop the A level my advice lol.....
    What do you mean?
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Updated: February 22, 2018
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