The Ladder Company wants to develop a cost estimating equation for its monthly cost of electricity. It has the following data: 
Using the high-low method, which of the following is the best equation?
Definitions:
Sierra Club
An environmental organization based in the United States, dedicated to protecting the planet's natural environments and promoting sustainable ecology practices.
Theodore Roosevelt
The 26th President of the United States, known for his conservation efforts, who established the U.S. Forest Service and numerous national parks, forests, and monuments.
Industrialized Countries
Nations that have undergone the process of industrialization, characterized by a high level of economic development and manufacturing capability.
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