To estimate the population total, \( N \) typically represents the total number of units in the population. Without seeing the diagram, I can't provide a definitive answer, but based on your options, it seems you are looking for a specific value that presumably represents the total number of seeds or plants indicated in the diagram.
If I were to make an educated guess based on common scenarios in such contexts, \( N \) could often be the total count represented as either 270, 30, 9, or 70. However, you would need to check the diagram for specifics on the total count in your garden plot.
Please select the value that aligns with the total number of seeds or relevant units indicated in the diagram. If I had more context, I could assist further!