Here is the graph of y = 



-----------------------------------------

y =   This one replaces x by x+2 which shifts it 
left 2 units and adds 6 on the right side, so it also shifts it
6 units up, so it's like this green graph:

 

-----------------------------------------

y =   This one replaces x by x+2 which shifts it 
left 2 units and adds -6 on the right side, so it also shifts it
6 units down, so it's like this green graph:



-----------------------------------------

y =   This one replaces x by x+6 which shifts it 
left 6 units and adds 2 on the right side, so it also shifts it
2 units up, so it's like this green graph:



-----------------------------------------

y =   This one replaces x by x+6 which shifts it 
left 6 units and adds -2 on the right side, so it also shifts it
2 units down, so it's like this green graph:



-----------------------------------------

Edwin