So the easiest way to solve this is to use the straight line provided .
180=90+61+x
180=151+x
29=x
The answer is 7.
Look at the x=8 and then look up the y-value.
The graph passes (8,7) so therefore when x = 8 the y is 7
54 percent
You add the two together to get 39, then divide 21 by 39. This gives you 0.538, which turns into 54%
The mean is 7.5 you add up all the numbers and then divide by the amount of numbers there is
