An investigation was conducted into the concentration of nitrate in three leafy crops (spinach, lettuce, and rocket) grown under different nitrogen fertilizer treatments (low, medium, and high). Nitrate is a chemical compound that can accumulate in leafy vegetables under intensive fertilization.
The bar chart below shows the concentration of nitrate measured in the crops:
The daily recommended maximum intake of nitrate for safety is 600 mg600\text{ mg}600 mg for an adult.
A single portion of rocket has a mass of 60 g60\text{ g}60 g.
A person eats rocket that has been grown under High Nitrogen treatment.
Calculate the maximum number of whole portions of this rocket the person can eat in a day without exceeding the recommended maximum intake of nitrate.
Use the graph.