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Math Help - Expression miles driven in range with cost

  1. #1
    @chung
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    Question Expression miles driven in range with cost

    Hi,
    I have a Math problem below really stretches beyond my linear math algebraic equation (y=mx +c) understanding of 2 sets of specific number data. The problem, given a range of data verses another set of specific number. Please help if you have the solution. Many thanks and appreciate.


    Cassidy rented a truck to move 120 miles from Ithaca to Attica. The table shows the cost for renting the truck based on the number of miles driven.
    Miles driven Cost ($)
    0-9 25
    10-19 31
    20-29 37
    30-39 43
    40-49 49
    Write an expression to determine the cost of renting the truck for m miles.
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  2. #2
    Forum Admin topsquark's Avatar
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    Quote Originally Posted by @chung View Post
    Hi,
    I have a Math problem below really stretches beyond my linear math algebraic equation (y=mx +c) understanding of 2 sets of specific number data. The problem, given a range of data verses another set of specific number. Please help if you have the solution. Many thanks and appreciate.


    Cassidy rented a truck to move 120 miles from Ithaca to Attica. The table shows the cost for renting the truck based on the number of miles driven.
    Miles driven Cost ($)
    0-9 25
    10-19 31
    20-29 37
    30-39 43
    40-49 49
    Write an expression to determine the cost of renting the truck for m miles.
    When you graph this I would consider the center of each mileage interval. So we have the set of points
    (5 miles, $25)
    (15 miles, $31)
    etc.

    Notice that the price goes up $6 for every additional 10 miles.

    -Dan
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