Question

How do you know whether two quantities x and y are proportional? Every ratio yx for related pairs of x and y is equivalent. Every sum x + y is the same for related pairs of x and y. Every x term is a multiple of the previous term. Every difference x – y is the same for related pairs of x and

Answer 1

Two quantities x and y are said to be proportional if ratio yx for related pairs of x and y is equivalent.

Explanation:

Two quantities x and y are said to be proportional if ratio
`yx` for related pairs of
`x` and y is equivalent.

The symbol ∝ is used to denote the proportionality. For example, if
`x` is proportional to y, then it is represented as
`x`∝y and if
`x` is inversely proportional to y, then it is represented as
`x` ∝ 1/y