The controller of the Blade Company wants you to estimate a cost function from the following two observations in general ledger account called Maintenance: Required 1. Estimate the cost function for maintenance. 2. Can the constant in the cost function be used as an estimate of fixed maintenance cost per month? Explain. Requirement 1. Estimate the cost function for maintenance. Information Month Machine-Hours Maintenance Costs Incurred January 4,000 $ 3,800 February 9,000 5,000