Kallie Smith, owner of Flowers 4 You, operates a local chain
of floral shops. Each shop has its own delivery van. Instead of
charging a flat delivery fee, Smith wants to set the delivery fee
based on the distance driven to deliver the flowers. Smith wants to
separate the fixed and variable portions of her van operating costs
so that she has a better idea how delivery distance affects these
costs. She has the following data from the past seven months:
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