If the store is making 18 jars of jam, how many cups of sugar will they need?

A 8 cups
B 9 cups
C 8.5 cups
D 9.5 cups

B. 9 cups

Step-by-step explanation:

The x coordinate is number of jam jars while y coordinate is number of cups of sugar.

If you look at the graph at (2,1), it is saying that there is 1 cup of sugar for every two jam jars.

If you look at (4,2) that is saying that for 4 jars of jam, they need 2 cups of sugar, which confirms my statement above that the ration of Jam Jars to Cups of Sugar is 2:1.

The last point on our graph is (10,5). Lets continue from there.

(12,6)

(14,7)

(16,8)

(18,9). If you noticed, the y is always HALF of the x is this problem.

step-by-step explanation:

the answer would be  

a.

3: 1

step-by-step explanation: