A business owner purchased an energy-efficient air conditioning syste…

Question

Prompt

A business owner purchased an energy-efficient air conditioning system for a cost of

$4, 200

, including installation. The business owner saves

$940

per year to operate the new system compared to the operating cost of the old system. Including the cost of the new system, which function

f

gives the total amount, in dollars, the business owner has saved

x

years after purchasing the new system?

f (x) = - 4, 200 x + 940

f (x) = - 940 x - 4, 200

f (x) = 940 x - 4, 200

f (x) = 4, 200 x - 940