When the distance is kept fixed, speed and time vary directly with each other.

When the speed is kept fixed, time and distance vary inversely with each other

Length of a side of a square and its area vary directly with each other.

If two quantities x and y vary directly with each other, then

In which of the following case, do the quantities vary directly with each other?

Direct variations if two quantities a and b vary with each other in such a manner that the ratio (a)/(b) remains constant and is positive then we say that a and b vary directly with each other or a and are in direct variation

If two quantities p and q vary inversely with each other, then

Fill in the blanks in each of the following so as to make the statement true: (i) Two quantities are said to vary ______ with each other if they increase (decrease) together in such a way that the ratio of the corresponding values remains same. (ii) x\ a n d\ y are said to vary directly with each other if for some positive number k , _____ = k (iii) If u\ =3\ v , then u and v vary ______. with each other.

If x = 5y, then x and y vary ______ with each other

If one angle of a triangle is kept fixed then the measure of the remaining two angles vary inversely with each other

On increasing a, b increases in such a manner that a/b remains______ and positive, then a and b are said to vary directly proportional with each other.