Question 17
If x=5y, then x and y vary ___with each other.
Given, x =5y Then, xy=51=k =constant ∴ x and y vary directly with each other.
Question 18
If xy =10, then x and y vary___with each other.
Question 31
If the quantities x and y vary directly with each other, then___of their corresponding values remains constant.
Question 43
Two quantities x and y are said to vary directly with each other if for some rational number k, xy =k.