I can’t see the problem very well, but your answer should be the one with (-3/2,0) as the intersecting point on the graph.
Answer:
I do think I can answer this
If similarity ratio means the ratio between the lengths of the cubes:
Any number multiplied by 1 is the number. Think about it this way. If I have 1 group of 8 apples, how many apples do I have? I have 8 apples :)