Lydia writes the equation below with a missing value
Y=5x-?

She puts the value in a box and says that the equation represent a direct variation. Which explains whether the equation could represent a direct variation?

A. The equation is not of the form y=kx, so it cannot represent direct variation.

B. If she puts 5 in the box,she would have a direct variation.

C. If she puts 0 in the box,she would have direct variation.

D. The equation has a minus sign,it cannot represent direct variation.

Someone please help me