So, as you can see from the picture below
the line coming down from the right-angle, creates 3 similar triangles
a large, a medium and a small one
the large one, is the one containing the other two smaller ones... anyhow
to get "x", you can use proportions, either from large and medium or small and large so
solve for "x", either proportion will do
Okay # 1
Y = 6x (I don't know why there's two answer choices)
# 2
Uhh it should be increasing linear but the (3,8) kinda threw it off
The answer is "A" because you need your equation to be like:
Ax + By = C
18 over 36 gives u 0.5 since u said round off to the nearest 100 .The answer is still 0.5 because 0 its not more than 5