Were you taught linear programming in high school?

I never studied linear programming and just picked up the basics of it on my own. I have been doing some online tutoring and I have worked with students doing linear programming in two dimensions. This seems like a fairly advanced topic for high school. I know just enough to help the students. Did you learn linear programming? Did they give an explanation for why it works? For the two dimensional case it is not difficult to give an intuitive explanation. I think that if the subject is taught then some sort of explanation should be given.