Megan has 4 red marbles, 5 blue marbles, and 9 yellow marbles. what is the ratio of blue marbles to yellow marbles?

a.
(5/4) or 5: 4
b.
(4/9) or 4: 9
c.
(4/5) or 4: 5
d.
(5/9) or 5: 9

D. 5:9

Step-by-step explanation:

Why it is D is you look based off the blue to yellow marbles. There are 5 blue marbles and there are 9 yellow marbles. You then just put those into a ratio which is 5:9.

linear pair postulates