Question 20
When two quantities x and y are in ___proportion or vary ___, they are written as x∝1y.
When two quantities x and y are in inverse proportion or vary inversely, they are written as x∝1y.
Question 19
When two quantities x and y are in___proportion or vary___, they are written as x∝y..
Two quantities x and y are said to vary in inverse proportion, if there exists a relation of the type xy = k between them, k being a constant.
Question 43
Two quantities x and y are said to vary directly with each other if for some rational number k, xy =k.