Answer: See attached.
Explanation:
We see from the given values that for every table there is 3* the number of guests and vise versa (for every 3 guests there is one table). Using this information we can complete the other values by multiplying or dividing.
3 tables * 3 = 6 guests
15 guests / 3 = 5 tables
9 tables * 3 = 27 guests
30 guests / 3 = 10 tables