Answer:
y=1/4-3x/4 is your answer
First you add the two parts of the ratio.
2 + 4 = 6
then you divide
30 / 6 = 5
then you multiply into the original ratio
(2 x 5) : (4 x 5)
10 : 20
Answer:
According to the graph, the answer would be the 5th month leading with 18 keychains but since I don't see that as an answer choice in the picture you provided, the answer would be the 4th month trailing close behind with a total of 16 keychains.