I’m usually not a fan of online videos explaining concepts in maths,as I feel that they don’t go or explain the material that well however I was pleasantly surprised when I came across http://www.youtube.com/user/profrobbob?feature=watch. Definitely worth subscribing to his channel, and I’m thinking of making a donation later this year near Christmas.
I watched this video http://www.youtube.com/watch?v=KtgddI4qIok&feature=youtube_gdata_player
Graphing lines using X & Y Intercepts : Mathematics Online Resource (Linear Relations)
Found this video really interesting, and made the concepts clearer and easier to understand.
Another Video not really relating to learning maths concept, but more exploring by math’s concepts by doodling which I recommend watching for fun are
~ Keep learning, and exploring