Question

2) A lemonade recipe calls for cup of lemon juice for every cup of water. Use the table to answer these questions: χ What does x represent? у 1 1 4 What does y represent? 2 1 Is there a proportional relationship between x and y? 3 2 3 4 4 1 3) Describe what ALL graphs of proportional relationships have in common.

Answer 1

Notice that the x-values start at 1, and the y-values start at 1/4.

This is a telltale sing that x represents the cups of water and y represents the cups of lemonade.

Since we have a constant relationship for the cups of water and the cups of lemonade (1/4 cups of lemonade per 1 cup of water), we can conclude that they are indeed proportional.