A vector going in the direction of .
You want to move along by 1 unit, so a unit vector going in that direction is
Therefore, to get to your point I, you need to add to each component of your starting point .
So your point .
A vector going in the direction of .
You want to move along by 1 unit, so a unit vector going in that direction is
Therefore, to get to your point I, you need to add to each component of your starting point .
So your point .