Question

Which equation represents a direct variation?
y = 2*
y = x +4
y= 1/2 x
y=3/X

Answer 1

y =
`(1)/(2)` x

Explanation:

The equation of quantities in direct variation is

y = kx ← k is the constant of variation

The only equation in this form is

y =
`(1)/(2)` x