Clara's utility function is U(x, y)= (x + 2)(y +1).If her marginal rate of substitution is -4 and she is consuming 14 units of good x, how many units of good y must she be consuming?
A)30
B)68
C)18
D)63
E)9

Question

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The Answer of Clara's utility function is U(x, y)= (x + 2)(y +1).If her marginal rate of substitution is -4 and she is consuming 14 units of good x, how many units of good y must she be consuming?
A)30
B)68
C)18
D)63
E)9

Clara's Utility Function Is U(x, Y)= (X + 2)(y +1)