You forgot to add in your height to your question. To find your area you need to do 8 + 14 and get 22 then you nee to do the height divided by two. If you give me the height of the triangle I can tell you the area.
I think its camp. would be the answer
60%
Working
£5:100%
£1:20%
£8:160%
So percentage increase is 60%
If it is directly proportional, then:
m = kx
10 = k x -4
k = -2.5
m = 3 x -2.5
m= 7.5
Hope I helped!
I got the answer 3n^2 + 4 but that isn’t one of the listed options. take a look at my working out.