I'm completely blind and come from a programming background.

What I'm trying to do is to learn machine learning, and to do this, I first need to learn about linear regression. All the explanations on the Internet I am finding about this subject plot the data first. I'm looking for a practical explanation of linear regression that is not dependent on graphs and plots.

I would really appreciate it if I could get an example with the explanation, so that I can do it along with the text to test my understanding.