Question

Which equation is a direct variation function?

y = 4
y = 1/3x+ 4
y = x
y = x3

Answer 1

y=x

Explanation:

direct variation form is y = kx where 'k' is the constant of variation

y=4 This has no 'x' variable

y = 1/3x+4 The constant of variation is 1/3 but then 4 is added, so no direct

y = x³ The 'x' variable must be to the power of one

Answer 2

y=4

Explanation:

its asking which one you can answer without any more context, in this case its y=4 because all the other ones evolving x lead to a rabbit hole and will take you in circles.