Answer
Please see the graph.
The marginal rate of substitution is 2.
Work Step by Step
The marginal rate of substitution tells us the number of glasses of wine a consumer would willingly give up in order to get one additional pound of cheese.
The price of wine is 3 dollars per glass, and cheese is 6 dollars per pound. So, the marginal rate of substitution is $6/3$, or 2. This means that a consumer would be willing to give up two glasses of wine for one additional pound of cheese.
