Question

Which of the following equations represents a proportional relationship?

Answer 1

The correct option is 2. The proportional relationship represented by the equation y=12.5x.

Explanation:

If y and x shows a proportional relationship, then

`y\propto x`

`y=kx`

Where, k is constant of proportionality.

First equation is

`y=3x^2`

It does not represents a proportional relationship.

Second equation is

`y=12.5`

It represents a proportional relationship. So, option 2 is correct.

Third equation is

`x+y=3`

`y=3-x`

It does not represents a proportional relationship.

Fourth equation is

`y=4x-1`

It does not represents a proportional relationship.

Therefore correct option is 2. The proportional relationship represented by the equation y=12.5x.