Toytoy Googie's Geeky blog

From this video, I found it very easy to understand. Staring 07:23, he use the formula of " Point-Slope Equation of a Line ", which is "y - y1 = m(x - x1)". So y1 = -1, x1 = 1, m = -1 [the result from the derivative using implicit differentiation] so, y - y1 = m(x - x1) y - -1 = m(x - 1) y + 1 = -1 (x -1) y = -x + 1 - 1 y = -x Note that, Point-Slope Equation of a Line is different from Equation of a Straight Line formula .         

Now in this blog, I'm starting to compile videos that I have found very helpful in learning Mathematics, and this will include diverse subjects and branch of Mathematics [Calculus, Linear Algebra, Trigonometry, Geometry, etc.], and even Theoretical Computer Science. For videos, I'll be putting notes from what I have understand from them so that I cannot forget what I have learned from the videos.