Final answer:
David's average monthly payment to Mackenzie was $298, calculated by subtracting the remaining debt from the initial amount owed and then dividing by the number of months in the year.
Step-by-step explanation:
To calculate the average monthly payment David made to Mackenzie, we need to determine the total amount paid throughout the year. We start with the initial amount David owed, which was $9,452, and subtract the remaining debt after the year, which is $5,876. This gives us the total amount paid over the year: $9,452 - $5,876 = $3,576.
There are 12 months in a year, so to find the average monthly payment, we divide the total amount paid by 12 months:
$3,576 / 12 = $298 per month.
Therefore, David's average monthly payment to Mackenzie was $298.