In the equation y=8x what is the constant variation

Question

i don't understand it please help me 

Answer 1

In equation of the form  y = kx, y varies directly as x and the constant of variation is equal to k.  

 

So for example, in the equation  y = 2x  the constant of variation would be 2.  

Answer 2

In the equation y=8x what is the constant variation
i don't understand it please help me

 

This a matter of definition: here we got y directly varies from x.

By definition, the constant of direct proportionality (which is multiplied by x)

is called constant of variation.

So that, here constant variation is 8!