Direct variation write equation

Question

The variables x and y vary directly. Use the values to find the constant of proportionality and write an equation that relates x and y. Write the equation in the form y=kx.

y = 4; x = 6

k= 2/3

!equation

...?

y = 2; x = 10

k= 1/5

!equation 

...?

Answer 1

y=kx

y=(2/3)x or y= 2x/3

and

y= (1/5)x or y=x/5