Consider the utility function . Which of the following are true statements about the indifference maps represented by this function.

A.

MRS=-1 along the 45 degree line if and only if .

B.
MRS=-1 along a ray steeper than the 45 degree line if and only if .

C.
MRS=-1 along a ray shallower than the 45 degree line if and only if .

D.
All of the above.

E.
None of the above.


Answer: A

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