kelly le: Can u please make a slow version for Kara Mr.? Shina Cloud: XD nanners head tilts as the plane tilts XD ale mata: yo compre este tinte pero en tono ciruela según reflejará como morado pero no es verdad me dejo el cabello negro y seco, tieso, no me gusto para nada . spongey bobo: duhhhh preston gallagher: at the end when his daughter entered the shop and he responded "Morning Chula" just tugged at my heart strings. what a genuinely good person. Angel seems to be. I wish him nothing but blessings and customers for his shop. thanks Haircut Harry for such a great video. Si Dang Ngoc: éo mắc lỗi nào mình quá chuẩn Worldwide Center of Mathematics: Hey +Keivan Monfared, thanks for your comment. I can see how this is confusing, but Dave is actually correct in the video. “Change in distance traveled” is definitely the correct term if you consider something like this: A person travels from points A to B (30 meters) in 60 seconds and from points B to C (40 meters) in 60 seconds without pausing at point B. If you need to find the average speed from A to C, you’ll use the change in distance from points A to C, which comes out to be the total distance: 70 meters in 120 seconds. But if you need to find the average speed simply from B to C, you’ll need to use the change in distance from B to C in 60 seconds. And in calculus, remember to think of “position” as a vector quantity for velocity, and “distance” as a scalar quantity for speed. Sorry for the big paragraph! It boils down to this: it is possible for change of distance traveled to equal the total distance traveled, but that is not always the case.