The graph shows estimated annual user expenditures on pesticides by pe

For the year 1994, I took the user expenditure for Fungicides as 1500, Insecticides as 4000 and Herbicides and plant growth as 10000 which comes down to the total 15500.

1. Let's calculate the percentage growth for each pesticide type:

- Herbicides & PGR went from (7300 - 3100) = 4200 to (12400 - 6600) = 5800, which is a percentage growth of \(\frac{5800 - 4200}{4200} * 100\% \approx 38.1\%\).
- Insecticides went from (3100 - 1150) = 1950 to (6600 - 2200) = 4400, which is a percentage growth of \(\frac{4400 - 1950}{1950} * 100\% \approx 125.6\%\).
- Fungicides and Other went from (1150 - 0) = 1150 to (2200 - 0) = 2200, which is a percentage growth of \(\frac{2200 - 1150}{1150} * 100\% \approx 91.3\%\).

So, Insecticides experienced the most growth.

2. To find out how much insecticides accounted for total expenditures in 1994, we first have to find the total expenditures. This is the top of the graph if we draw a vertical at the year 1994 - 10000. Now, the difference between the intersections of the same vertical with top and bottom of the gray area, or 4050 - 1400 = 2650. The percentage will be \(\frac{2650}{10000} * 100\% = 26.5\%\).

3. Our answer will be: D1 - Insecticides and D2 - "between 25% and 30%".

Thank you so much for providing a detailed analysis of this problem. Somehow, I got the answer correct. But now I realize that my approach is completely wrong. Thank you!