It is.
Go easy on them. They are only teachers. They wasted their lives at some university or such instead of experiencing the one true religion in the basement of their parents houses.
Drawing graphs in school you say. Say did they also teach the very important distinction between the graph of the function, i.e. the set of ordered (x,y) value pairs where x is from X and y from Y so that f:x -> y holds and the function itself which is an association f:x -> y. And what exactly is a function? It is a relation, so that for a given x there is at most one y. And what is a relation? It is a subset of XxY. And what exactly is XxY, what are the elements of it? Well they are ordered value pairs (x,y) where x is from X and y from Y.
That's the beauty. There is nothing to learn. You see the bits, you see the pattern.
If this is heading somewhere I don't know where to.
Chubby hen it is.
I suspect that there must have been people who learned assembler from scratch, to give us high level languages.