Which pair of ratios cannot form a proportion?
4/5, 24/30
4/5, 20/25
36/45, 4/5
4/5, 20/30

Ifound this on google “that means that the graph of a function with direct variation has these features: it is a straight line: because the slope is the ratio y/x = k. it passes through the origin (0,0): because y = kx = k (0) = 0.” i hope this you for what your looking for