Tell whether x and y show direct variation. Explain your reasoning. x/y = 20

Question

Tell whether x and y show direct variation. Explain your reasoning.

y/x = 20

Answer 1

direct variation means y=kx for some real number k

x/y = 20. multiply both sides by y

x=20y, divide by 20

y= (1/20)x k= 1/20 = 0.05

because you can write the equation in y=kx form, it's direct variation