Kathy Smith, owner of Flower Power, 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 the van's operating costs to get a better idea of how delivery distance affects these

costs. Here are the data from the past seven months:

View the data.

Use the high$-$low method to determine Flower Power's cost equation for van operating costs. Use your results to predict van

operating costs at a volume of $15,000$ miles.