Given the following information, determine the equation for the unit formulation. (Round intermediate calculations to 4 decimal places) [Image Description: Table listing Unit Number (X) and Unit Cost ($Y). Unit 1 = $900, Unit 2 = $780, Unit 3 =$717.37, Unit 4=$676.00]

Y = (900)(X) ^-0.1521

Y = (900)(X) ^0.9000

Y = (900)(X) ^-0.2065

Y = (900)(X) ^0.6931