There must be 2 lines on every plane because you need a y-axis and an x-axis.
Y X
80 32
100 x'
80x' = 100*32
80x' = 3200
x' = 3200/80
x' = 320/8
x' = 40
It would be the last one because 5 columns are shaded and there are 10 columns all together. 50/100= 0.5
Use Photomath or desmo to give you the answer
