math

A museum charges $4 for a group of 4 or fewer people. A group of more than 4 people must, in addition to the $4, pay $2 per person for the number of people above 4. The maximum group size is 9.

(a) What are the domain and range of this cost function? Enter your answers as comma separated lists of numbers.

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  1. domain is people
    there could be 1 min and could be 9 max

    range is dollars
    there could be $4 min to 4+2*9 = $22 max

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