Yeah I'm familiar with what QBasic is and many of the other BASIC dialects that preceded it (I'm old :P). I'd agree that it's a language variant / dialect. My issues is when people talk about QBasic as if it was it's own single entity. But then I guess where do you draw the line? eg by my same logic, C++ just a variant of C, yet it's clearly sane to describe them separately. So perhaps I was being overly picky.

As a side note, QBasic does support line numbers - albeit for legacy reasons and not recommended syntax. And some dialects of BASIC did support functions - though the syntax was awkward so I usually just used GOSUB / RETURN when I needed procedures with no return values.