Compare and contrast slope and average rate of change

How do you find principle and simple interest

Sheila wants to bake six muffins but the recipe is for 12 muffins . this means you only need half of the ingredients listed how much of the of each ingredient does she need? one cup and banana chips ,7 tablespoons oil , two eggs, 3/4 cups flour 1/4 cup walnuts show all you work and justify your answer using a baby toulmin.

Hi i’m not sure how to do question 20 if u could explain how to do it that’d b great