If all the ratios of the variable are equivalent, they are meant to have a proportional relationship. Moreover, in a proportional relationship, one variable is always a constant value times the other variable. This constant value is known as “constant of proportionality”. For instance, y = kx where ‘k’ is the constant of proportionality. This is also known as the unit rate.

Grade 7

Rates And Proportional Relationships

7.RP.A.2.A