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