can someone help me write a linear cost equation using y for estimated costs and x for activity cost driver

if the machine operating cost include $200,000 of machine deprciation per year plus $75 of utlity cost for each day the machine is in operation.
:confused:

y=200,000+75X

Thank you

A company buys and retails baseball caps. The total cost function is linear, the total cost for 200 caps is $2680, and the total cost of 500 caps is $3530. Write the equation that models this cost function.

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