Final answer:
To find the amount of water needed for 9 cups of flour based on the bread recipe's ratio of 2 cups of flour to 1 cup of water, you divide 9 cups of flour by 2, resulting in 4.5 cups of water needed.
Step-by-step explanation:
Solving for the Amount of Water Needed
The question involves a bread recipe that requires 2 cups of flour for every 1 cup of water. If you are using 9 cups of flour, to find out how much water you need, you set up a proportion based on the recipe's ratio. Since the ratio is 2:1 for flour to water, you can think of it as having 2 parts flour for every 1 part water. Therefore, if you have 9 cups of flour, you would split that into ½ of the flour amount to determine the cups of water because 9 cups flour × (1 cup water / 2 cups flour) = 4.5 cups water.
So, you will need 4.5 cups of water for 9 cups of flour following the recipe.