I am going to say I am personally aquanted with the owner of lazyfoo.net.

You can find some really great intro to game graphics. Not really geared to general game design, but rather the graphics system behind them, like pausing, capping framerates, and blitting images.

Applications: Well if you want a real world example of linear algebra and it being used in real world applications, you are going to love the tutorial sets on image blitting.

http://lazyfoo.net/