proportional relationships have constant ratios.
the graph is a line, so it is a proportional relationship. (A)
the function is in the form y=kx (proportional function) (C)
Find the ratio of the tables: (B)

D

All represent a proportional relationship
21 and 22 because 21+22=43
Acute usually means below or exactly 90°, so the greatest would be 90
Ok, first you have to just completely ignore the circles, they arent important.
Secondly, The ratio is, 5 stars to every 11 squares