what is the proportional relationship

A proportional relationship is a relationship between two variables where their ratios are equivalent. In other words, one variable is always a constant value times the other, and that constant is known as the "constant of proportionality". For example, if the ratio between the number of eggs and cups of milk is 2:1, then 4 eggs would correspond to 2 cups of milk, 8 eggs would correspond to 4 cups of milk, and so on. To determine if a relationship is proportional, you can look at the different values that the variables take on when one variable is one value, and then what the other variable becomes. If the ratio between the two variables is always the same, then the relationship is proportional. A proportional relationship can be represented by a straight line on a graph that passes through the origin.