Chapter 12 – Direct and Inverse Proportions – R S Aggarwal Solutions for class 8
Direct proportions: Two Quantities are said to be in direct proportion if whenever the value of one increases or decreases then the value of other increases or decreases in such a way that ratio between them remains constant.
If two quantities are x and y then x/y remains constant
That is, x1/y1 = x2/y2 = x3/y3 ……. = k
Direct variation or proportion
where k is a constant