Question

Which equation represents a direct variation? y = 2x y = x + 4 y = x y =

Answer 1

The first equation is a direct variation. This type of equation has a form that is "y = kx," in which k is the constant. Changing both sides by a common multiple will still lead to the equation being evaluated as true, since the values will both increase by that multiple.

Answer 2

Solution:

Meaning of Direct Variation:

Two quantities vary directly if two of them are directly proportional to each other.

For example : equation of any line passing through origin is an example of direct variation.

Their equation is given by : 1. x = k y  or 2. y = k x where k is constant of variation.

Out of the options given : 1. y = 2 x

2.  y = x   are examples of direct Variation.