Question

A direct variation function contains the points (2, 14) and (4, 28). Which equation represents the function?

Answer 1

Direct variation mean x =ky so y = x/k

(2,14) mean y = kx so 14 = k*2 so 14 = 7*2 so 14 = 14 
(4,28) mean y = kx so 28 = k*4 so 28 = 7*4 so 28 = 28

from these result that the 3rd choice is right sure 

Answer 2

y = 7x THIS IS THE ANSEWR