Question

Choose an equation that does not represent a direct variation.
A) y = x
B) y = 1
C) y = -5x
D) y = 0.9x

Answer 1

Direct variance means the function follows the general form y=kx. There must be a y, must be a k, and must be an x. One of the functions above lacks an x, therefore is not directly varying

Answer 2

I am guessing it is B

Answer 3

It is.