To determine how many cups of blueberries Marco will need for 2 cups of flour, we need the ratio of flour to blueberries. However, since you mentioned a table but didn't provide its contents, I'll assume a common ratio for blueberry muffins, which is typically around 2 cups of flour to 1 cup of blueberries.
If we use this ratio, we can set it up as follows:
\[ \text{Flour} : \text{Blueberries} = 2 : 1 \]
This means for every 2 cups of flour, Marco will use 1 cup of blueberries.
Since Marco has 2 cups of flour:
\[ \text{Blueberries needed} = \frac{1 \text{ cup of blueberries}}{2 \text{ cups of flour}} \times 2 \text{ cups of flour} = 1 \text{ cup of blueberries} \]
So, Marco will need 1 cup of blueberries if he has 2 cups of flour.
If you have a different ratio from the table, please provide it, and I can adjust the calculation accordingly!