Yes. I'm not sure if I got them right but for (i) I got 30 units^2. For (ii) I got root 8 or 2 by root 2. For (iii) I got root 17. For (iv) I got 2 by root 17 over 3. I forgot what it was in decimal form.
It's over and done with now so don't stress out
I don't see how the line graph would work,though.I'm not being rude,I just can't see it.Looking back,stem and leaf would have been the best,but I didn't think of that.Only thing is,because a bar chart is so clear (to me,at least) I didn't do workings,and just drew and labelled the bar chart.If it's wrong,I'm screwed
I also use two different colours for lines and make a key to tell which is 2005 and 2015. I used the boxes for 1 country per box and there was 28 countries. If I did a bar chart, it would look real messy and confusing - I would have to make every bar small and tiny to fit in with the small boxes. It is for this reason why I didn't do one of them and did a line graph instead.
But yeah to answer people's questions about the stem and leaf, they are perfectly acceptable because the question says:
Display the data GRAPHICALLY in a way that allows you to compare the data for the two years. Label your graph(s) clearly. Show any calculations that you make.
And it says on the internet:
"A stem-and-leaf display is a device for presenting quantitative data in a GRAPHICAL format".
I hope this answer your question
For 5a I said no because you end up with 6 which I not equal to 0. For 7b, I got 90 degrees. I used SSS to prove congruency. For 8a, I think I got 16 degrees or something. This is the smaller angle because the other angle was 74 degrees roughly.
i did like 2 histograms stuck together so it was like a load of bars stuck together with the intervals on the bottom and matching up 2015 and 2005 for each interval. i thought you couldnt do a bar chart because it was continuous data?