Which equations represent proportional relationships? Select all that apply. A) y = x/3
B) y = 6x^2
C) y = (1/4)x
D) y = x^3
E) y = x + 2
F) y = 2x

11 12 triangle abc is congruent to triangle fde, and both triangles have the same orientation, as shown. what is the slope of df, which is also the slope of ac?