The starting point is at . When we move up or down we are moving along the -axis. When we move to the right or left we are moving along the -axis. 

Moving up the -axis and moving right on the -axis means addition. 

Moving down the -axis and moving left on the axis means subtraction. 

Because we are moving down , we can subtract  from our  coordinate point and because we are moving to the left  we can subtract  from our coordinate point. 

The starting point is at . When we move up or down we are moving along the -axis. When we move to the right or left we are moving along the -axis. 

Moving up the -axis and moving right on the -axis means addition. 

Moving down the -axis and moving left on the axis means subtraction. 

Because we are moving down , we can subtract  from our  coordinate point and because we are moving to the left  we can subtract  from our coordinate point. 

The starting point is at . When we move up or down we are moving along the -axis. When we move to the right or left we are moving along the -axis. 

Moving up the -axis and moving right on the -axis means addition. 

Moving down the -axis and moving left on the axis means subtraction. 

Because we are moving down , we can subtract  from our  coordinate point and because we are moving to the left  we can subtract  from our coordinate point. 

The starting point is at . When we move up or down we are moving along the -axis. When we move to the right or left we are moving along the -axis. 

Moving up the -axis and moving right on the -axis means addition. 

Moving down the -axis and moving left on the axis means subtraction. 

Because we are moving down , we can subtract  from our  coordinate point and because we are moving to the right  we can add  to our coordinate point. 

The starting point is at . When we move up or down we are moving along the -axis. When we move to the right or left we are moving along the -axis. 

Moving up the -axis and moving right on the -axis means addition. 

Moving down the -axis and moving left on the axis means subtraction. 

Because we are moving down , we can subtract  from our  coordinate point and because we are moving to the right  we can add  to our coordinate point. 

The starting point is at . When we move up or down we are moving along the -axis. When we move to the right or left we are moving along the -axis. 

Moving up the -axis and moving right on the -axis means addition. 

Moving down the -axis and moving left on the axis means subtraction. 

Because we are moving down , we can subtract  from our  coordinate point and because we are moving to the right  we can add  to our coordinate point. 

The starting point is at . When we move up or down we are moving along the -axis. When we move to the right or left we are moving along the -axis. 

Moving up the -axis and moving right on the -axis means addition. 

Moving down the -axis and moving left on the axis means subtraction. 

Because we are moving up , we can add  to our  coordinate point and because we are moving to the right  we can add  to our coordinate point. 

The starting point is at . When we move up or down we are moving along the -axis. When we move to the right or left we are moving along the -axis. 

Moving up the -axis and moving right on the -axis means addition. 

Moving down the -axis and moving left on the axis means subtraction. 

Because we are moving up , we can add  to our  coordinate point and because we are moving to the right  we can add  to our coordinate point. 

The starting point is at . When we move up or down we are moving along the -axis. When we move to the right or left we are moving along the -axis. 

Moving up the -axis and moving right on the -axis means addition. 

Moving down the -axis and moving left on the axis means subtraction. 

Because we are moving up , we can add  to our  coordinate point and because we are moving to the right  we can add  to our coordinate point. 

The starting point is at . When we move up or down we are moving along the -axis. When we move to the right or left we are moving along the -axis. 

Moving up the -axis and moving right on the -axis means addition. 

Moving down the -axis and moving left on the axis means subtraction. 

Because we are moving up , we can add  from our  coordinate point and because we are moving to the right  we can add  to our coordinate point.