I somehow understood the same thing(a graph is a collection of points that makes a function true..) a year ago through Gilbert Strang Big picture of derivatives

I somehow understood the same thing(a graph is a collection of points that makes a function true..) a year ago through Gilbert Strang Big picture of derivatives: https://www.youtube.com/watch?v=T_I-CUOc_bk https://www.youtube.com/watch?v=T_I-CUOc_bk