The Ladder Company wants to develop a cost estimating equati…

The Ladder Company wants to develop a cost estimating equation for its monthly cost of electricity. It has the following data: Month Cost of Electricity Direct Labor Hours February $ 8,100    750 May  9,000   850 August 10,200 1,000 November  8,700   800 ​ Using the high-low method, which of the following is the best equation?