Answer:
9
Step-by-step explanation:
18 + 18 is like 36 divied by 2 is 18 then dvide that by two is 9 so 9
A-the data set is symmetrical
The answer is the 1st graph. This is because a square have 4 sides and it is all the same. on the x axis (Side length) when it is 4 the perimeter (Length around the outside) will be 4 x 4 which is 16.
Hope this helps?
