Dear Ma'am Hope you are well and Allah Almighty blessed on you always. Thank You so much for saving my Ms career, These days I'm addicted to your lectures.

You are so clear, thank you! I would like to have a teacher like you!

Thank you first for the great content dear Professor. On question please : Why @9:45 the professor called the quotient y2-y1/x2-x1 as f'(x2) while she called the second quotient y1-y0/x1-x0 as f'(x0)? In fact, the image of the derivative function f' of some function f at some point x0 is defined as: lim (x->x0) f(x)-f(x0)/x-x0 = f'(x0). Thus, the first quotient should be f'(x1) instead of f'(x2) using the same analogy. Unless she considered y2-y1/x2-x1 = -(y1-y2)/-(x1-x2) = y1-y2/x1-x2 which makes more sense. Could anyone correct me please on that. Thanks.

Thanks.

Does your book cover all your video ?

you are beautiful , you make me like this subject