No derivation at x=3 .
only at x=3
I think it's the second one on the top, because the dotted one is actually inside the bigger one and you can get a clear representation of the sizes.
For the mean, add together all of the numbers together (let's call the total x) and count how many numbers there are. (let's call this number y). divide x by y, and that is your mean. for the median, put all the numbers in order, and the median is the number in the middle. if there are two numbers in the middle, add them together and divide them by 2.
Answer:
I'm pretty sure it is (2,0)
Perimeter is the distance around the outside.
A square has 4 equal sides:
Perimeter = 21 x 4 = 84 yards