What is the answer plz plz i need so much

Which equation represents a proportional relationship that has a constant of proportionality equal to 1/5

Name the most appropriate metric unit for each measurement like the mass of cow

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.