I'm not sure what you mean, but the root of graphics is graphikos, Greek for writing or drawing. Mathematical graphs are called that by analogy to their graphical forebears.
You have confused root and origin. The root of graphics is graph.
The comment I replied to said GPUs are more useful in cryptocoin mining and AI rather than graphics. Cryptocoin mining and AI are graph workloads. This is why GPUs are well suited to these tasks.
