Answer:
b.

Explanation:
Cost of the couch = $2904
Orlando will pay for 24 months = $121
The equation that Orlando can use to find out how much money he still owes after each month of the plan will be :

Let us check this :
Let us take x = 1
= $2783 left to pay
Let us take x = 2
= $2662 left to pay
Let us check x = 4
= $2420 left to pay
Therefore, option B is correct.