Answer:
You only have to sort (numbers with numbers and variables with variables) then do the operations (+/-).
Step-by-step explanation:

Divide 10 each time.
300/10=30
30/10=3
3/10=0.3
0.3/10=0.03
0.03/10=0.003
etc.
The X coordinate has to be 0
There is no graph to support the statement and so, this invisible graph is misleading :)
option c is the answer....