Answer:
5
Explanation:
In economics, the marginal rate of substitution (MRS) refers to the unit of good X that a consumer is ready to give up in order to consume an additional unit of good Y in order to maintain the same level of satisfaction.
Since it is assumed graphically that good X is on the horizontal axis and good Y is on the vertical axis, the MRS of good X for good Y is given as follows:
MRSx,y = - (dy/dx) = MU_x/MU_y ................................................ (1)
Where,
MRSx,y = marginal rate of substitution of X for Y = ?
Marginal utility of X = MU_x = 10
Marginal utility of Y = MU_y = 2
Substituting the values into equation (1), we have:
MRSx,y = 10/2 = 5
Note that since the minus sign is already included, this gives us -5 and it is interpreted that the consumer is ready to give up 5 units of Y to have an extra unit of X.