Suppose that the central bank has the policy set R equal to 1 if inflation equals 4% and GAP = 0. Raise R by 0.5 points for every point of inflation above 4%. Reduce R by 0.5 points for every point
that inflation falls short of 4%. Increase R by 0.5 points for every percentage point of GAP, if GAP
> O. Reduce R by 0.5 points for every percentage point of GAP, if GAP < 0.
All but one of the following is an equation that is consistent with this rule. Which is the exception?
AO F = 1 + 0.5(n - 4) + 0.5GAP + n
B© R = 1 ÷ 0.5n + 0.5GAP
C© F = -1 + 1.5л + 0.5GAP
D© R = 1 + 05(7 - 4) + 0.5GAP