Final answer:
To assess the amounts or ratios' relationship influenced by a write-off, identify the variables x and y, use data to derive a linear equation, and analyze the direct or inverse proportionality.
Step-by-step explanation:
To calculate the amounts or ratios before and after a write-off and determine the relationship between them, you should first identify the system of interest and the information provided. We're given x as the amount or ratio before the write-off, and y as the amount or ratio after the write-off. Step 1 is identifying variables: Let x = the number pre-write-off and y = the number post-write-off. In a case where a linear relationship is present, you would enter your data into a calculator or computer to write the linear equation, rounding to four decimal places.
For better understanding, visualization with a sketch can be helpful. Once the equation is established, you can analyze how x and y change in relation to each other. Remember, the key is to 'analyze the data' effectively. If the relationship is directly proportional, then as x increases, y will also increase and vice versa. If it's inversely proportional, then as x increases, y decreases and vice versa. This should be noted down for thorough comprehension.