Answer: 1/4 cups of butter
Explanation:
You need 1/2 cups of butter for every 2 eggs.
When a question asks for the unit rate, it means what quantity of the other variable is needed per 1 unit of the variable in question.
In other words, how many cups of butter are needed per egg.
= Cups of butter / no. of eggs
= 1/2 ÷ 2
= 1/4 cups of butter