You are given the following information concerning the training running hours and their respective maintenance cost for the first 4 months in 2023.

Month	Training cost	Train running hours
January	$13,600	2,100
February	$15,800	2,800
March	$14,500	2,200
April	$16,200	3,000

Using regression analysis what is the cost function from the data above ( show all the necessary workings) 20 marks

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