Final answer:
To find the ice-cream parlor's average annual profit, we use the Linear Function Family and divide the total profit by the number of years, resulting in $14,000 per year.
Step-by-step explanation:
To calculate the average annual profit for Mr. Jones's ice-cream parlor, we use the Linear Function Family. This is because the average profit per year is simply the total profit divided by the number of years, which is a ratio, indicating a linear relationship between total profit and time. Thus, we will divide $84,000 by 6 to determine the average annual profit.
So, the average annual profit is $84,000 / 6 = $14,000 per year.