Final answer:
To solve this problem, you need to use proportions to increase the recipe to serve the number of people in your class, including your teacher. Calculate the new ratio for one serving and multiply the original amounts by this ratio to determine the new amount of each ingredient.
Step-by-step explanation:
To solve this problem, you need to use proportions to increase the recipe to serve the number of people in your class, including your teacher. Let's say the original recipe serves 6 people and the ratio for one serving is 1/6.
If you need to serve 20 people, you can set up a proportion: 1/6 = x/20, where x represents the new ratio for one serving. Solving for x, we get x = 20/6 = 10/3. So, the new ratio for one serving is 10/3. To calculate the new amount of each ingredient, multiply the original amounts by 10/3.