Number 6 is add up all the numbers, then divide by how many numbers there are. In other words it is the sum divided by the count.
7. You should use a line graph when your need to track changes over short and long periods of time
8. The dependent variable goes on the y axis
Answer:
This is a plasmatic membrane (cell membrane) that bounds a cell.
The answer to this is C because humans don't have cell walls and if you are looking at an onion it has a cell wall because it is a plant.