To be honest, I think a question like "What do you think the graphics of X game compare to?" would have been better. That question still wouldn't make proper sense though. Because the "graphics" of a game is not normally determined by the system, but by the developers.
Yes, I know that the system limits how "good" they can look, but it does not limit the amount of effort the developers can put into utilizing the system to its limits. The graphical limitations of a system are defined by how and what the processors can handle (The ones that handle graphical processing anyway, through the use of hard filters and such), the amount of storage (Like, texture cache). But if a developer was to put minimal effort into the graphics of a game on one system and another developer was to put a lot of effort into the graphics of a game on another system, then they are not really comparable at all either because you can't say that this game has "DS graphics" and this one has "Nintendo 64 graphics" when the developer put no effort in to the graphics of one of the games.
The point of this post is to say that you can't really compare a games graphics to a video games systems "graphics", because they're completely different ideas. There's no such thing as "Nintendo 64 graphics", you could talk about the way the 64 handles video processing or how a game on that system looked in comparison to X game. If you want to compare the graphics of one game to another game of that era (or one of a certain platform) by providing examples to compare to, then it would make much more sense.
If you wanted to make a generalization of the "best looking" games on a system (For example: Conker's Bad Fur Day) and then compare those to the generalization of the "best looking" games on another system, that would also make sense.