Answer:
A.

Explanation:
We can see in the table that Wendy uses 2 lemon juice ounces for every 6 ounces of water.
The equation
simply means that j = 2.
Let's just try the other equations to see what they represent.
6j = 3
This means that for every ounce of juice there are 6 more ounces of water and it will be equal to 3, which is untrue.
j = 6(2)
This means the amount of juice is equal to 12, an it does not represent anything else.

This means that 1/2 of every ounce of juice will be equal to 6, which is not true.