And what's this going to be? 1 plus 2 is 3 plus 4 is 7 divided by 3. It is equal to 7 over 3. Now, what is the mean of our y's? The mean of our y's, once again I'm going to do this in a neutral color, the mean of our y's is equal to 2 plus 1 plus 3, all of that over 3. So this is 2 plus 1 is 3 plus 3 is 6 divided by 3 is equal to 2. This is 6 divided by 3 is equal to 2.