Answer:To determine if the relationship between the amount of vinegar and oil in the salad dressing is proportional, you can compare the ratio of vinegar to oil used by Manuela to the ratio called for in the recipe.
The recipe calls for 3 parts oil to 1 part vinegar. This means for every 3 tablespoons of oil, you should use 1 tablespoon of vinegar.
Manuela used 6 tablespoons of oil and 2 tablespoons of vinegar.
Now, let's compare the ratios:
Manuela's ratio of oil to vinegar: 6 tablespoons of oil to 2 tablespoons of vinegar, which can be simplified to 3:1.
The recipe's ratio of oil to vinegar: 3 parts oil to 1 part vinegar, which is also 3:1.
Since both ratios are 3:1, Manuela's use of oil and vinegar is in proportion to the recipe's instructions. Therefore, it is a proportional relationship.