BusyBee Cleaning Co$.$ is evaluating its costs to clean a standard office. The controller has done a linear regression of the hours spent cleaning various offices and the total costs $($labor$,$ supplies, transportation$)$ for each office cleaned. The regression analysis yielded the following information.

$y=$$$25x+$$$75$

$y=$ total cost to clean an office

$x=$ hours spent cleaning an office

What is the best description of the costs of cleaning an office based on this regression analysis?

$*$Source: Retired ICMA CMA Exam Questions.

There is $$25$ of fixed costs and $$75$ of variable costs per hour to clean an office.

The cost is $$100$ per hour to clean an office.

There is $$25$ of variable costs per hour and $$75$ of fixed costs to clean an office.

The cost is $$25$ per hour to clean an office.