When any two quantities are compared, they are meant to be in a ratio. The variable or quantities are expressed in the form of a/b. In proportion, they are written as a:b. The two variables x and y are meant to be proportional, when y = kx. Here, y and x are two different variables and k is the constant of proportionality. This is known as ‘Proportional Relationship’.

Grade 7

Rates And Proportional Relationships

7.RP.A.2.D