The controller of the Trunk Company wants you to estimate a cost function from the following two observations in a general ledger account called Maintenance:

$($Click to view the information.$)$

Required

Estimate the cost function for maintenance.

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. $($Round your answers to the nearest cent as needed.$)$

Maintenance costs $=$